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  • Home
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    • What is FARM-D?
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  • What is ARM?
    • Understanding Risks
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plant diseases

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Working with farmers to control sweet potato virus disease in East Africa

Sweet potato virus diseases (SPVD) are an important biotic constraint to sweet potato production in parts […]

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Variation in the Fusarium section Liseola: pathogenicity and genetic studies of isolates of Fusarium moniliforme Sheldon from different hosts in Ghana

Fusarium moniliforme, the imperfect stage of the ascomycete Gibberella fujikuroi, is an economically important pathogen with […]

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Variation for pathogenicity among isolates of bean common mosaic virus in Africa and a reinterpretation of the genetic relationship between cultivars of Phaseolus vulgaris and pathotypes of BCMV

Bean common mosaic virus (BCMV) isolates were collected from crops of Phaseolus vulgaris (bean) and from […]

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Variability of Colletotrichum kahawae in Relation to Other Colletotrichum Species from Tropical Perennial Crops and the Development of Diagnostic Techniques

Twenty-six isolates of Colletotrichum kahawae, the causal agent of coffee berry disease, from coffee in Africa, […]

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Use of tRNA consensus primers to indicate subgroups of Pseudomonas solanacearum by polymerase chain reaction amplification

Polymerase chain reaction amplification of DNA from 112 Pseudomonas solanacearum strains with the tRNA consensus primers […]

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Use of PCR for detection of Mycosphaerella fijiensis and M. musicola, the causal agents of Sigatoka leaf spots in banana and plantain

There are two Sigatoka leaf spot diseases of banana and plantain, yellow Sigatoka and black Sigatoka. […]

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Use of an Advanced Intercross Line Population for Precise Mapping of Quantitative Trait Loci for Gray Leaf Spot Resistance in Maize

Gray leaf spot [GLS, causal agent Cercospora zeae-maydis (Tehon and E. Y. Daniels)] is an important […]

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Up-to-date manual of coffee pests and diseases. Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Ultrastructure of the Infection of Sorghum bicolor by Colletotrichum sublineolum

Ultrastructural studies of the infection of susceptible and resistant cultivars of Sorghum bicolor by Colletotrichum sublineolum […]

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Threats to cassava production: known and potential geographic distribution of four key biotic constraints

Insect pests and plant diseases reduce cassava yields substantially, posing a threat to food security throughout […]

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The use of the random amplified polymorphic DNA techniques to identify mating groups in the Fusarium section Liseola

The random amplified polymorphic DNA (RAPD) technique was used to determine the mating groups of several […]

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The use of species-specific DNA probes for the identification of Mycosphaerella fijiensis and M. musicola, the causal agents of Sigatoka disease of banana

The polymerase chain reaction (PCR)-based technique of random amplification of polymorphic DNA (RAPD) was used to […]

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The significance of sweet potato feathery mottle virus in subsistence sweet potato production in Africa

Sweet potato originated from Central and/or South America. The International Potato Center (CIP) in Lima, Peru, […]

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The relationship between antifungal diene levels and fungal inhibition during quiescent infection of unripe avocado fruits by Colletotrichum gloeosporioides

Quantitative changes in the antifungal compound, 1-acetoxy-2-hydroxy-4-oxo-heneicosa-12.15-diene, in freshly harvested avocado fruits during the initial stages […]

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The occurrence of bean common mosaic necrosis virus in wild and forage legumes in Uganda

Bean common mosaic necrosis virus (BCMNV) was isolated from Centrosema pubescens, Crotalaria incana, Lablab purpureus, Phaseolus […]

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The influence of exposure to ultraviolet radiation in simulated sunlight on ascospores causing Black Sigatoka disease of banana and plantain

The influence of ultraviolet (UV) radiation in simulated natural sunlight on the viability of ascospores of […]

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The Genetic Architecture of Disease Resistance in Maize: A Synthesis of Published Studies

Fifty publications on the mapping of maize disease resistance loci were synthesized. These papers reported the […]

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The effects of cassava mosaic virus disease on yield and compensation in mixed stands of healthy and infected cassava

The effects of cassava mosaic virus disease (CMD) on yield in fully and partly infected stands […]

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The effect of reduced phytoalexin production on the resistance of upland cotton to verticillium and fusarium wilts

The effect on disease development of inhibiting the production of the sesquiterpenoid phytoalexin hemigossypol (HG) in […]

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The effect of hot water treatment on the levels of antifungal diene and quiescence of Colletotrichum gloeosporioides in avocado fruits

Quantitative changes in the antifungal compound 1-acetoxy-2-hydroxy-4-Oxo-heneicosa-12, 15-diene in harvested avocado fruits, and the development of […]

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The effect of climatic factors on Colletotrichum gloeosporioides, causal agent of mango anthracnose in the Philippines

The epidemiology of the anthracnose pathogen of mango, Colletotrichum gloeosporioides, was studied over two growing seasons […]

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The ecology and epidemiology of whitefly-transmitted viruses in Latin America

Whitefly-transmitted geminiviruses are the most important constraint to the production of common bean and vegetable crops […]

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The biology and control of Colletotrichum species on tropical fruit crops

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The association between root necrosis and above-ground symptoms of brown streak virus infection of cassava in southern Tanzania

A survey was conducted in southern Tanzania to determine the relationship between above?ground symptoms of cassava […]

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Tethered flight and morphometric studies with Cicadulina storeyi and C. mbila leafhoppers (Hemiptera: Cicadellidae) vectors of maize streak virus in Uganda

Tethered flight studies, carried out in southern Uganda with the leafhoppers Cicadulina storeyi China and C. […]

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Systematic Numbering of Vegetative Compatibility Groups in the Plant Pathogenic Fungus Fusarium oxysporum

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Sustainable Agriculture Research for International Development (SARID)

This media briefing provides details of the 12 grants awarded to projects under the SARID programme. […]

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Susceptibility to ergot in Zimbabwe of sorghums that remained uninfected in their native climate in Ethiopia and Rwanda

Forty-four local Ethiopian and Rwandan sorghums (Sorghum bicolor) were observed to remain free of ergot, or […]

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Survey of cassava virus diseases in Tanzania

A survey was carried out of African cassava mosaic geminivirus and cassava brown streak virus diseases […]

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Superelongation disease, caused by Elsinoe brasiliensis, confirmed on cassava in Trinidad & Tobago

In 2007, a new disease was observed on cassava in fields in the north, south and […]

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Stolen harvest in Pocona in Bolivia.

This case study describes the role of the agronomist in identifying the pests and diseases affecting […]

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Sterility mosaic disease – the ‘green plague’ of pigeonpea: advances in understanding the etiology, Transmission and control of a major virus disease

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Starting plant health clinics in Nepal

Two pilot plant health clinics in Nepal were held in December 2008 in Lamjung District, one […]

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SSR-based diversity in elite pigeonpea genotypes for developing mapping populations to map resistance to Fusarium wilt and sterility mosaic disease

In order to maximize polymorphism in the mapping populations for mapping loci for Fusarium wilt (FW) […]

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SSR analysis of F1, intra specific crosses of cassava for the identification of new sources of CMD resistance in African germplasm.

Results of work on resistance to cassava mosaic disease in Africa are summarized.

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Spatial dynamics of maize streak virus disease epidemic development in maize fields

An experiment was performed to investigate the spread of infection in maize streak virus epidemics. Four […]

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Spatial and temporal spread of cassava mosaic virus disease in cassava grown alone and when intercropped with maize and/or cowpea.

The spread of cassava mosaic disease (CMD) and populations of the whitefly vector (Bemisia tabaci) were […]

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Sources of resistance to Pseudomonas syringae pv. phaseolicola races in Phaseolus vulgaris

One thousand and forty-eight Phaseolus bean accessions were evaluated for resistance to six races of Pseudomonas […]

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Diseases caused by Ganoderma boninense are a threat to sustainable palm oil production in South East Asia

Diseases caused by Ganoderma boninense are considered the greatest threat to sustainable palm oil production in […]

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Simulation Modelling of the Spread of Rice Tungro Virus Disease: The Potential for Management by Roguing

A simulation model of the dynamics of rice tungro virus disease (RTVD) was developed to assess […]

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Showcase 18: Oiling the wheels of groundnut production.

This series of two-page brief highlights some of the new technologies and processes available, in order […]

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Serological relationships and epitope profiles of isolates of okra leaf curl geminivirus from Africa and the Middle East

A panel of seven murine monoclonal antibodies (mAbs) was raised against particles of okra leaf curl […]

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Selection of a genetic variant within Colletotrichum gloeosporioides isolates pathogenic on mango by passaging through wounded tomato fruits

A genetic variant virulent on tomato was selected by passaging field isolates of Colletotrichum gloeosporioides, obtained […]

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Selection Mapping of Loci for Quantitative Disease Resistance in a Diverse Maize Population

The selection response of a complex maize population improved primarily for quantitative disease resistance to northern […]

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Science and partnership take the punch out offinger millet blast. Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Sapallanga Peru has clinic in the market

This market, close to Huancayo, is busy,even when it’s raining. Germ??n, Juan, Antonio and Rebecca are […]

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Root exudates associated with resistance in four varieties of chickpeas (Cicer arietinum) to two races of Fusarium wilt. (Fusarium oxysporum f.sp ciceri).

The germination of race 1 spores of Fusarium oxysporum f. sp. ciceri was significantly inhibited by […]

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Risk assessment for rice planthopper and tungro disease outbreaks

Comparisons are drawn between the decision-making processes used in the management of two major pests of […]

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Rice sheath blight complex caused by Rhizoctonia species: Pathogen epidemiology and management strategies. Final Technical Report, Project R7778

This project aimed to establish the epidemiology of the Rhizoctonia species involved in the rice sheath […]

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Rice pests in the Ivory Coast, West Africa: Farmers’ perceptions and management strategies

An understanding of farmers’ perceptions of pests and their existing pest control methods can make an […]

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Rice Germin-Like Proteins: Allelic Diversity and Relationships to Early Stress Responses

Germin-like protein (GLP) markers were associated with quantitative trait loci (QTL) for resistance to the rice […]

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Ribosomal and mitochondrial DNA polymorphisms in Colletotrichum gloeosporioides isolated from tropical fruits

DNA polymorphisms in 38 isolates of Colletotrichum gloeosporioides infecting avocado, banana, mango and papaya were examined […]

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Report on Biological Aspects, Bangladesh, Nepal and India

The assessment of biological aspects or potential constraints related to the adoption of Resource Conserving Technology […]

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Recurrent Selection Mapping in Two Maize Populations Suggests that Some Common Loci are Associated with Northern Leaf Blight Selection.

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Recognition and differentiation of seven whitefly-transmitted geminiviruses from India, and their relationships to African cassava mosaic and Thailand mung bean yellow mosaic viruses

Particles resembling those of geminiviruses were found by immunosorbent electron microscopy in extracts of plants infected […]

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Recessive bacterial leaf blight resistance in rice: Complexity, challenges and strategy

Physical mapping and map-based cloning strategies are routinely used for identification of candidate genes for major […]

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Rapid responses to new plant diseases: the use of going public to monitor the spread of Xanthomonas wilt and control Napier grass stunt in East Africa

Since 2002, the Global Plant Clinic (GPC), Surrey, UK, has strengthened plant health advisory services for […]

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Quick, accurate tests identify plant diseases – Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Promotion of ICPM for smallholder coffee R8423 (ZA 0650): Final Technical Report

The purpose of this project was to contribute to poverty reduction by improving the level of […]

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Promotion of current knowledge on pests of coffee in East Africa – Final Technical Report

The primary purpose of the project was to collate current knowledge on the major pests and […]

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Production of antibodies to pseudomonas solanacearum the causative agent of bacterial wilt

Both polyclonal and monoclonal antibodies have been developed to Pseudomonas solanacearum, the causative agent of bacterial […]

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Prevention is the best cure for banana viruses. Validated RNRRS Output.

Smallholder growers in the Philippines and Uganda can now recognise virus infections in their banana plants. […]

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Presence of banana xanthomonas wilt (Xanthomonas campestris pv. musacearum) in the Democratic Republic of Congo Republic (DRC).

In May 2004, following reports from local farmers of a devastating new banana disease, three authors […]

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Presence of banana bacterial wilt (Xanthomonas campestris pv. musacearum) in Rwanda

In September 2005, visits were made to five sites within the Gisenyi province in northern Rwanda […]

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Preliminary observations on the mating behavior of Cicadulina storeyi China and C. mbila Naudé (Homoptera: Cicadellidae)

Several species of the genus Cicadulina are vectors of maize streak virus (MSV) (Rose, 1978). This […]

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Precise mapping of quantitative trait loci for resistance to southern leaf blight, caused by Cochliobolus heterostrophus race O, and flowering time using advanced intercross maize lines

The intermated B73 x Mo17 (IBM) population, an advanced intercross recombinant inbred line population derived from […]

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Pre-and post-harvest control of mango anthracnose in the Philippines

Two field trials were conducted in the Philippines in successive years to compare the effectiveness of […]

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Fighting sweet potato virus diseases

Sweet potato is an important staple crop in East Africa, where it provides vital food for […]

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Bean root rot: getting the upper hand

Beans are one of Africa’s key crops. The common bean (Phaseolus vulgaris) is the second most […]

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Playing the generation game

Forty-one percent of the world’s sorghum area is located in Africa, yet sorghum yields in this […]

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Plant Health Clinics, Bangladesh. Getting better all the time

This video, in English and Bengali with English subtitles, promotes the work of the Global Plant […]

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Plant health clinics in Bolivia 2000—2009: operations and preliminary results

Smallholder farmers need information on plant diseases. Ten plant health clinics (Postas para Plantas) evolved in […]

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Plant Health Clinics for Sierra Leone

This report describes the setting up of plant clinics in each of the 13 administrative districts […]

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Plant Health Clinic Initiative in Nepal

Plant clinics get introduced in Nepal and taking up its momentum with technical guidance and help […]

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Phytoalexin accumulation in the roots of chickpea (Cicer arietinum L.) seedlings associated with resistance to fusarium wilt (Fusarium oxysporum f.sp.ciceri)

Four cultivars of chickpea which differed in their reaction to Fusarium oxysporum f.sp.ciceri, the pathogen causing […]

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Phylogenetic analysis based on ITS sequences and conditions affecting the type of conidial germination of Bipolaris oryzae

One taxonomic characteristic of Bipolaris species is the bipolar germination of conidia, but conidia of Bipolaris […]

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Phosphonic acid: an alternative approach to the control of black pod disease of cocoa caused by Phytophthora megakarya.

Cocoa is the main commodity crop of Ghana and is financially important for the livelihood of […]

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Phenolic compounds and resistance of yam (Dioscorea alata) to anthracnose caused by Colletotrichum gloeosporoides

Leaves of yam (Dioscorea alata) cv. White Lisbon are highly susceptible to infection by the anthracnose […]

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Perspectives on Pests II: Achievements of research under UK Department for International Development Crop Protection Programme 2000-05

Perspectives on Pests II contains profiles of research funded by DFID’s Crop Protection Programme between 2000 […]

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Pests and Diseases of Coffee in Eastern Africa: A Technical and Advisory Manual

This manual covers 5 pest and 5 disease constraints affecting coffee. These were identified and prioritized […]

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PCR-based detection and characterization of Pseudomonas solanacearum for use in less developed countries

Pseudomonas solanacearum-specific DNA sequences were identified by 16S rRNA sequencing and genomic subtraction experiments. Oligonucleotide primers […]

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PCR-based detection and characterization of Pseudomonas solanacearum for use in less developed countries

Pseudomonas solanacearum-specific DNA sequences were identified by 16S rRNA sequencing and genomic subtraction experiments. Oligonucleotide primers […]

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Particle purification, properties and epitope variability of Indian tomato leaf curl geminivirus

A whitefly-transmissible stock isolate of Indian tomato leaf curl geminivirus (ITmLCV) was cultured in graft-inoculated tomato […]

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Options for Managing Maize Grey Leaf Spot

Grey Leaf Spot (GLS) is a disease of maize caused primarily by the fungus, Cercospora zeae-maydis. […]

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Orange-fleshed sweetpotatoes for food, health and wealth in Uganda.

Uganda is the world’s second largest producer of sweetpotato after China. About 43 million children in […]

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Occurrence of Tomato mosaic Havana virus in Nicaragua

In May 2006, severe virus-like symptoms were reported on tomatoes by the plant health clinic in […]

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Oiling the wheels of groundnut production. Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Nucleotide sequence of the rDNA spacer 1 enables identification of isolates of Colletotrichum as C. acutatum

Nucleotide sequence of the rDNA internally transcribed spacer (ITS) 1 of twelve isolates of Colletotrichum, originally […]

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Nicaragua – Public Plant Health Services for All – Results and Lessons Learned 2005-2007

In early 2005, the Nicaraguan Foundation for Technological Development in Agriculture, Livestock and Forestry (FUNICA) began […]

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Multivariate analysis of maize disease resistances suggests a pleiotropic genetic basis and implicates a GST gene

Plants are attacked by pathogens representing diverse taxonomic groups, such that genes providing multiple disease resistance […]

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Morphological and molecular identification of Pythium species pathogenic to common beans in Uganda

This is a series of one-page information leaflets. It focuses on pathogenic common to beans in […]

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Monitoring in banana pest management

Monitoring in banana pest management is an important activity for commercial and/or smallholder banana production. It […]

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Molecular characterization of the Cassava brown streak virus coat protein

A partial sequence of 1114 nucleotides of a virus from cassava brown streak diseased (CBSD) material […]

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Modulation of natural resistance of avocado fruits to Colletotrichum gloeosporioides by carbon dioxide treatment

The level of the antifungal compound, 1-acetoxy-2-hydroxy-4-oxo-heneicosa-12,15-diene, in the peel of avocado fruits decreased during ripening. […]

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Modelling reinfection of replanted cocoa by swollen shoot virus in pandemically diseased areas

Reinfection of healthy replanted cocoa (Theobroma cacao) by swollen shoot disease, caused by a mealybug-transmitted virus, […]

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Milking crops for all their worth

Demand for milk and meat is increasing in South Asia, and this increases the demand for […]

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Method, creativity and Committees For Local Agricultural Research (CIALs)

CIALs (Committees For Local Agricultural Research) are community level organisations for helping agricultural scientists and farmers […]

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Mapping the d1 and d2 Dwarfing Genes and the Purple Foliage Color Locus P in Pearl Millet

The d1 and d2 dwarfing genes and the P purple foliage color gene were placed on […]

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Mapping and Genetic Dissection of Loci Conditioning Disease Resistance in Maize

The primary emphasis of this study is to identify and characterize QTLs for resistance to northern […]

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Management strategies for maize grey leaf spot (Cercospora zeae-maydis) in Kenya and Zimbabwe

The current project was developed in response to a call from DFID’s Crop Protection Programme in […]

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Insect visitors are made to feel unwelcome in banana crops – Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Infection process and host specificity of a Colletotrichum species causing anthracnose disease of cowpea, Vigna unguiculata

The morphology, pathogenicity and host specificity of a strain of C. lindemuthianum (I57), causing anthracnose on […]

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Induction of the antifungal diene in unripe avocado fruits: effect of inoculation with Colletotrichum gloeosporioides

The concentration of the preformed antifungal compound 1-acetoxy-2-hydroxy-4-oxo-heneicosa-12,15-diene in unharvested avocado fruit was almost doubled for […]

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In the Eye of the Beholder: The Effect of Rater Variability and Different Rating Scales on QTL Mapping

The agronomic importance of developing durably resistant cultivars has led to substantial research in the field […]

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Improving information on rice pests and diseases in Bangladesh – Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Identification of Xanthomonas vasicola (formerly X. campestris pv. musacearum), causative organism of banana xanthomonas wilt, in Tanzania, Kenya and Burundi

In Tanzania, banana xanthomonas wilt was first reported in the Kagera region of north west Tanzania […]

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Identification of Xanthomonas vasicola (formerly X. campestris pv. musacearum), causative organism of banana xanthomonas wilt, in Tanzania, Kenya and Burundi

In Tanzania, banana xanthomonas wilt was first reported in the Kagera region of north west Tanzania […]

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Identification of Quantitative Trait Loci for Resistance to Southern Leaf Blight and Days to Anthesis in Two Maize Recombinant Inbred Line Populations

The genetic architecture underlying resistance in maize to southern leaf blight (SLB) caused by Cochliobolus heterostrophus […]

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Identification of Quantitative Trait Loci for Resistance to Southern Leaf Blight and Days to Anthesis in a Maize Recombinant Inbred Line Population

A recombinant inbred line population derived from a cross between the maize lines NC300 (resistant) and […]

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Identification of markers associated with bacterial blight resistance loci in cowpea [Vigna unguiculata (L.) Walp.]

Cowpea bacterial blight (CoBB), caused by Xanthomonas axonopodis pv. vignicola (Xav), is a worldwide major disease […]

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Identification of different isolates of Cassava brown streak virus and development of a diagnostic test

An RT-PCR based detection method for Cassava brown streak virus (CBSV)-infected cassava has been developed. The […]

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Identification of candidate genome regions controlling disease resistance in Arachis

Background: Worldwide, diseases are important reducers of peanut (Arachis hypogaea) yield. Sources of resistance against many […]

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Identification and origin of races of Pseudomonas syringae pv. phaseolicola from Africa and other bean growing areas

Isolates of Pseudomonas syringae pv. phaseolicola from Africa and other bean growing areas were categorized into […]

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Identification and Characterization of Regions of the Rice Genome Associated With Broad-Spectrum, Quantitative Disease Resistance

Much research has been devoted to understanding the biology of plant-pathogen interactions. The extensive genetic analysis […]

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Identification and Analysis of Maize QTL for Southern Leaf Blight and Gray Leaf Spot resistance

Working with the foliar diseases Gray Leaf Spot (GLS) and Southern Leaf Blight (SLB), the author […]

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Identification and characterisation of key screening sites for blast and scald resistance in West Africa – Final Technical Report

In response to the demand evidenced by a request from the West Africa Rice Development Association […]

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How the Global Plant Clinic began

Tiraque is a small town in Bolivia, about two hours from Cochabamba on the road to […]

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How farmers benefit from plant clinics: an impact study in Bolivia

Between 2000 and 2009, nine plant clinics in three agro-ecological areas of Bolivia (Andes, lowlands and […]

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Good practice in the molecular biology laboratory: diagnostic protocols

This Annex gives protocols related to the extraction and detection of phytoplasmas in coconut palms.

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Getting better all the time: Farmers and plant doctors talk about their work and plant health problems in Bangladesh

Farmers all have a story to tell to the plant doctors of Bangladesh. Plant doctors have […]

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Genome-wide nested association mapping of quantitative resistance to northern leaf blight in maize

Quantitative resistance to plant pathogens, controlled by multiple loci of small effect, is important for food […]

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Genome affinities and epitope profiles of whitefly-transmitted geminiviruses from the Americas

The relationships among fifteen isolates of whitefly-transmitted geminiviruses (WTGs) from North, Central and South America and […]

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Genetic mapping of the bean golden yellow mosaic geminivirus resistance gene bgm-1 and linkage with potyvirus resistance in common bean (Phaseolus vulgaris L.)

Bean golden yellow mosaic virus (BGYMV) is a whitefly-transmitted geminivirus of the Begomovirus family that causes important yield losses […]

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Genetic Gains from 30 Years of Cassava Breeding in Nigeria for Storage Root Yield and Disease Resistance in Elite Cassava Genotypes.

Cassava (Manihot esculenta Crantz) is crucial for both food security and poverty alleviation in Sub-Saharan Africa […]

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Genetic diversity of Ganoderma in oil palm plantings

Isolates of Ganoderma spp. associated with basal stem rot of oil palm were obtained by sampling […]

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Ganoderma boninense basidiospores in oil palm plantations: evaluation of their possible role in stem rots of Elaeis guineensis

Basidiospores are implicated in the distribution and genetic diversity of Ganoderma boninense, cause of basal stem rot […]

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Fusarium wilt of banana in Uganda with special emphasis on wilt-like symptoms observed on East African highland cooking cultivars (Musa spp., AAA)

Surveys were undertaken at 24 diagnostic sites in Uganda to determine the distribution and incidence of […]

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Fungal contamination and selected mycotoxins in pre- and post-harvest maize in Honduras

Sixty nine samples of maize were collected from pre-harvest standing crops and on-farm storage facilities from […]

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Full of beans: The Phaseolus thematic cluster

The common bean (Phaseolus vulgaris L.) makes an important contribution to food security, providing as much […]

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First report of the identification of Moroccan watermelon mosaic virus in papaya in Democratic Republic of Congo Republic

Pawpaw is the major cash crop in North Kivu, Democratic Republic of Congo Republic, where it […]

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First report of Pseudocercospora angolensis causing leaf and fruit spot of Citrus in Sierra Leone

In 2006, citrus fruit and leaves affected by dark brown lesions were noticed in orchards around […]

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First report of phytoplasmas affecting organoponic crops in central and eastern Cuba

Surveys of organoponics (organic and hydroponic systems) in Matanzas, Las Tunas and Stgo de Cuba provinces […]

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First report of Papaya ringspot virus infecting papaya in Cote d’Ivoire

In February 2006, pawpaw leaves with various symptoms, including yellow dots along the veins, yellow mosaic […]

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First report of Horsegram yellow mosaic virus infecting Phaseolus vulgaris in Sri Lanka

Bean (Phaseolus vulgaris) is one of the most important vegetables in Sri Lanka. In 1999, a […]

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First report of ‘Candidatus Phytoplasma trifolii’ (group 16SrVI) infecting Sauropus androgynus

During surveys conducted in October 2010, plants of Sauropus androgynus growing in small plots in Poring […]

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First report of ‘Candidatus Phytoplasma trifolii’ (group 16SrVI) infecting Sauropus androgynus

During surveys conducted in October 2010, plants of Sauropus androgynus growing in small plots in Poring […]

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First report of an isolate of ‘Candidatus Phytoplasma australiense’ associated with a yellow leaf roll disease of peach (Prunus persicae) in Bolivia.

During a survey in 2003 at San Isidro, Santa Cruz, Bolivia, peach trees showed symptoms similar […]

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First report of a phytoplasma identified in coconut palms (Cocos nucifera) with lethal yellowing-like symptoms in Papua New Guinea.

In October 2008, coconut plantations in the villages of Tobenam, Pupun and Dugumor, located in the […]

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First report of a phytoplasma identified in coconut palms (Cocos nucifera) with lethal yellowing-like symptoms in Papua New Guinea

In October 2008, coconut plantations in the villages of Tobenam, Pupun and Dugumor, located in the […]

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First report of a ‘Candidatus Phytoplasma asteris’ isolate associated with a witches’ broom disease of alfalfa in Bolivia

During a survey in 2003 in Limon Pampa, Rio Chico, Bolivia, lucerne (Medicago sativa) plants showing […]

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First report of a 16SrIII phytoplasma (X-disease group) affecting bell pepper, strawberry (frutilla), Schinus molle and Arracacia xanthorrhiza in Cochabamba, Bolivia

Recently, symptoms of leaf size reduction and yellowing, proliferation, and shortening of internodes were observed in […]

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First report of a 16SrII (‘Candidatus Phytoplasma aurantifolia’) group phytoplasma associated with a bunchy-top disease of papaya in Cuba

Phytoplasmas of the 16SrII and 16SrXII groups were first reported to cause mosaic, yellow crinkle and […]

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First report of a 16SrII group phytoplasma associated with die-back diseases of papaya and citrus in Ethiopia

This is the first record of phytoplasmas associated with die-back diseases of papaya and citrus in […]

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First report of a 16SrI, Candidatus Phytoplasma asteris group phytoplasma associated with a date palm disease in Saudi Arabia

In a survey conducted at Al-Hassa, Saudi Arabia, during 2003-05, leaf samples were collected from dates […]

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First report in the Americas of sorghum ergot disease, caused by a pathogen diagnosed as claviceps africana

A widespread and economically important epidemic of sugary disease in irrigated production of F1, hybrid seed […]

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First confirmed report of sugarcane common rust (Puccinia melanocephala) in Ethiopia

In March 2007, researchers at the Ethiopian Sugarcane Research Services Station observed an unrecorded disease in […]

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First confirmed report of citrus black spot caused by Guignardia citricarpa on sweet oranges (Citrus sinensis) in Uganda

In November 2006, orange fruits showing black spot symptoms were brought to the rural plant clinic […]

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Development of Pheromones for Management of Coffee White Stemborer, Xylotrechus Quadripe

The Purpose of the project was to develop improved methods for the management of priority pests […]

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Farmers’ perceptions and practices for managing tomato leaf curl virus disease in southern India

A survey of 174 tomato farmers in five districts of Karnataka State, South India, was conducted […]

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Farmers are full of beans

The common bean (Phaseolus vulgaris L.) is a major source of protein and calories in the […]

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Fahamu Magonjwa ya Fugwe (Smut Diseases) Na Athari za Kiduha (Striga) Kwewnye Mahatma Katika Moka wa Dodoma

Fugwe ya Mse ni ugonjwa unaosababishwa na ukungu aina ya Sphacelotheca sorghi na hushambulia sana mtama. […]

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Expression of avrPphB, an Avirulence Gene from Pseudomonas syringae pv. phaseolicola, and the Delivery of Signals Causing the Hypersensitive Reaction in Bean

Protein production encoded by the avirulence gene avrPphB from Pseudomonas syringae pv. phaseolicola was examined. Incorporation […]

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Epidemiology and population structure of Phytophthora species causing diseases of coconut in Indonesia

Budrot (BR) and premature nutfall (PNF) caused by Phytophthora spp. are the major plant disease problems […]

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Electrical penetration graphs from Cicadulina spp. and the inoculation of a persistent virus into maize

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Effects of antagonistic microorganisms on the post-harvest development of Colletotrichum gloeosporioides on mango

Potential microbial antagonists of Colletotrichum gloeosporioides were isolated from blossom, leaves and fruit of mango and […]

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Economic impact analysis of marker-assisted breeding for resistance to pests and post-harvest deterioration in cassava

Marker-assisted breeding could have a major impact on relieving productivity constraints that cannot as easily or […]

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Distribution of sigatoka leaf spots in Uganda as determined by species-specific polymerase chain reaction (PCR)

Black sigatoka (black leaf streak) caused by the fungus Mycosphaerella fijiensis, and yellow sigatoka caused by […]

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Disease management factors influencing yield and quality of sorghum and groundnut crop residues.

Crop residues from groundnut and sorghum constitute important fodder resources for dairy production and fodder trading […]

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Detection and differentiation of isolates of Colletotrichum gloeosporioides using PCR

An oligonucleotide primer (CgInt), synthesised from the variable internally transcribed spacer (ITS) 1 region of ribosomal […]

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Current Knowledge of Coffee Wilt Disease, a Major Constraint to Coffee Production in Africa

Coffee is vital to the economy of East and Central Africa, providing a major source of […]

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Control of Phytophthora megakarya diseases of cocoa with phosphonic acid

This project was directly concerned with the development and evaluation of an operator-safe fungicide and application […]

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Comparative analysis of peanut NBS-LRR gene clusters suggests evolutionary innovation among duplicated domains and erosion of gene microsynteny

Plant genomes contain numerous disease resistance genes (R genes) that play roles in defense against pathogens. […]

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Comparative epitope profiles of the particle proteins of whitefly-transmitted geminiviruses from nine crop legumes in India

Geminiviruses associated with yellow or golden mosaic diseases of legume crops in two regions of India […]

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Comparison of disease progress curves for yam anthracnose (Colletotrichum gloeosporioides)

The incidence and severity of foliar anthracnose, caused by Colletotrichum gloeosporioides, were recorded for seven fields […]

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Comparison of disease progress curves for yam anthracnose (Colletotrichum gloeosporioides)

The incidence and severity of foliar anthracnose, caused by Colletotrichum gloeosporioides, were recorded for seven fields […]

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Community-based breeding of superior, mosaic disease-resistant cassava in Ghana

Cassava is grown throughout sub-Saharan Africa and increasingly is the main starch staple, particularly in West […]

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Common bean breeding for resistance against biotic and abiotic stresses: From classical to MAS breeding

Breeding for resistance to biotic and abiotic stresses of global importance in common bean is reviewed […]

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Communities reap the benefits from new, improved cassava varieties – Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Coconut lethal yellowing disease: development of new diagnostic tools and laboratory support to promote their application

This project should have provided scientific support to coconut rehabilitation programmes by refining, validating and supporting […]

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Cercosporidium sequoiae isolated from Cupressus lusitanica in Saint Lucia

In July 2005, a new disease was found on Cupressus lusitanica in St. Lucia, West Indies. […]

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Cassava brown streak disease: a review of present knowledge and research needs

Cassava (Manihot esculenta) is an important subsistence food crop in Africa where it is affected by […]

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Bringing back bananas

Although Uganda is the world’s second-largest producer of bananas, productivity has declined markedly over the last […]

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Broad bean and sweet pepper: two new hosts associated with Candidatus Phytoplasma asteris (16SrI phytoplasma group) in Cuba

This paper presents the first report of Candidatus phytoplasma (16SrI group) on broad bean and sweet […]

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Biological control of bacterial wilt of potato in Kenya and Pakistan

Previous research under Project R5310 developed a biological control agent (BCA) against bacterial wilt disease of […]

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Better beans

Whitefly-transmitted diseases of crops such as cassava, sweet potato, beans, and vegetables are a serious problem […]

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Beating tungro virus disease in rice – Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Bean root rot disease management in Uganda

Project R8478 sought to underpin promotion of sustainable control of bean root rots through resistant varieties […]

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Basil little leaf: a new disease associated with a phytoplasma of the 16SrI (Aster Yellows) group in Cuba

During a survey in 2005 of weeds from the Alamar organoponic in Havana, Cuba, typical phytoplasma-symptoms […]

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Assessment and comparison of AFLP and SSR based molecular genetic diversity in Indian isolates of Ascochyta rabiei, a causal agent of Ascochyta blight in chickpea (Cicer arietinum L.)

Ascochyta blight (AB), caused by Ascochyta rabiei (Pass.) Labr. (anamorph), is the most damaging disease of […]

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Appropriate diagnostic systems for less developed countries

Strategies for effective diagnostic systems appropriate to plant pathology in less developed countries are presented. The […]

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Apparent absence of viruses in most symptomless field-grown sweet potato in Uganda

Symptomless sweet potato (Ipomoea batatas) plants obtained from farmers’ fields in each of the main sweet […]

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Analysis and modelling of the temporal spread of African cassava mosaic virus and implications for disease control

This paper reports the main conclusions of a series of experiments concluded at Adiopodoume in the […]

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An investigation of pesticide and microbial interactions on coffee as a means of developing an IPM strategy for economically important coffee pests in small-holder farming systems in Malawi. Final Technical Report, Project R6807.

This project was conducted in Malawi to obtain baseline data on the main pests and diseases […]

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An Epidemiological Model Incorporating Vector Population Dynamics Applied to African Cassava Mosaic Virus Disease

1. An epidemiological model of African cassava mosaic virus disease (ACMD) was developed in which the […]

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Alternative techniques for the application of sulphur dust to cashew trees for the control of powdery mildew caused by the fungus Oidium anacardii in Tanzania

Sulphur dusts are widely used in Tanzania to control powdery mildew on cashew trees, caused by […]

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An analytical model of plant virus disease dynamics with roguing and replanting

1. The dynamics of a virus disease in a perennial plant population are modelled. The population […]

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Adaptation of automated microbiology identification system (AMBIS) to determine fungal relationships using DNA polymorphisms

The beta scanner and pattern matching software integrated in the automated microbiology identification system (AMBIS) were […]

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A stunting syndrome of Napier grass in Ethiopia is associated with a 16SrIII group phytoplasma

Napier or elephant grass (Pennisetum purpureum ) is a perennial grass grown widely in East Africa as […]

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A new graft inoculation method for screening for resistance to pigeonpea sterility mosaic virus.

Three graft transmission methods (chip, cleft, and petiole grafting) were evaluated for their efficiency in transmitting […]

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A novel approach to quality assessment of plant health clinics

Since 2003, community-based plant health clinics have been established in several developing countries as a new, […]

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A novel mite-transmitted virus with a divided RNA genome closely associated with pigeonpea sterility mosaic disease

The agent of sterility mosaic, a disease that is a major constraint on pigeonpea (Cajanus cajan) […]

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A PCR-based method to distinguish fungi of the rice sheath-blight complex, Rhizoctonia solani, R. oryzae and R. oryzae-sativae

Identification of Rhizoctonia solani, R. oryzae and R. oryzae-sativae, components of the rice sheath disease complex, […]

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A potyvirus isolated from Senna occidentalis

A potyvirus causing severe mosaic symptoms was isolated from Senna occidentalis (syn. Cassia occidentalis) in the […]

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A geminivirus causing vein yellowing of Ageratum conyzoides in Singapore

A vein-yellowing disease of Ageratum conyzoides in Singapore was shown to be caused by a geminivirus, […]

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A Germin-Like Protein Gene Family Functions as a Complex Quantitative Trait Locus Conferring Broad-Spectrum Disease Resistance in Rice

Plant disease resistance governed by quantitative trait loci (QTL) is predicted to be effective against a […]

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A natural infection of Hebe is associated with an isolate of ‘Candidatus Phytoplasma asteris’ causing a yellowing and little-leaf disease in the UK

Hebe (Veronica scutellata) is a herbaceous ornamental perennial widely grown throughout the UK and elsewhere. In […]

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A billion people stand to benefit from pigeonpeaproduction improvements. Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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A cytological study of compatible and incompatible interactions between Sorghum bicolor and Colletotrichum sublineolum

Cytological and physiological studies were conducted on the infection process of Colletotrichum sublineolum P. Henn. Kabat […]

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48 Nuevas Ideas para Agricultores Bolivianos

This book contains 48 fact sheets (in Spanish) written during 4, five-day courses held in October […]

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Maize cob rot in Kenya and its association with stalk borer damage

Cob rots are a major cause of crop loss in areas such as western Kenya that […]

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Maize farmers in East Africa have a new basket of options – Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Local Knowledge of Plant Health in Bangladesh

The AAS (Agricultural Advisory Society) surveyed farmer knowledge of plant health problems on behalf of the […]

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Kale seed multiplication schemes take off inKenya. Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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IPM for smallholder coffee farmers in Malawi

The objective of Project R7942 was to develop a management strategy for the priority pests and […]

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Is Cassava the Answer to African Climate Change Adaptation?

This paper examines the impacts of climate change on cassava production in Africa, and questions whether […]

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Isolation of a Pseudomonas solancearum-specific DNA probe by subtraction hybridization and construction of species-specific oligonucleotide primers for sensitive detection by the polymerase chain reaction

A subtraction hybridization technique was employed to make a library enriched for Pseudomonas solanacearum-specific sequences. One […]

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