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    • What is FARM-D?
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    • Understanding Risks
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  • Library
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  • Home
  • About
    • What is FARM-D?
    • History
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  • What is ARM?
    • Understanding Risks
    • Holistic Approach
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plant viruses

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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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Unusually severe symptoms are a characteristic of the current epidemic of mosaic virus disease of cassava in Uganda

Mosaic disease (MD) is more severe in cassava plants infected within the area of the current […]

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The Viruses and Virus Diseases of Cassava in Africa

This review summarises the available information on the viruses and virus diseases of cassava in Africa. […]

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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 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 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 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 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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Sweet success in Uganda

This highlight report is associated with projects R6617 and R7492.

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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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Solutions to a mite(y) problem

Pigeonpea is an extremely important drought-tolerant legume grown by smallholder farmers in marginal farming systems 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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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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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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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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Agricultural Research and Extension Network Newsletter

One of Agricultural Research and Extension Network (AgREN)’s current areas of focus is public extension reform. […]

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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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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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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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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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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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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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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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Managing viruses in vegetables

Smallholder farmers are the main producers of cabbage and kale – popular crops for the periurban […]

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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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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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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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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 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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Groundnut Rosette Disease Epidemiology

The project’s purpose was to improve the productivity of smallholder, groundnut production in sub-Saharan Africa through […]

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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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Factors determining recovery and reversion in mosaic disease in African cassava mosaic virus resistant cassava

The severity and persistence of symptoms of mosaic virus disease were monitored during the first six […]

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

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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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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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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 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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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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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 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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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 […]

FARM-D
Forum for Agricultural Risk Management in Development
www.farm-d.org
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