The current project was developed in response to a call from DFID’s Crop Protection Programme in 1999. The purpose of the project was to provide effective management of GLS based on sound epidemiological principles. This was achieved through the successful delivery of five main project outputs. 1. Variability of the pathogen population determined using representative isolates from both Kenya and Zimbabwe; 2. Cultural practices affecting GLS incidence and severity identified; 3. Disease epidemiology established through field experimentation and supported by the use of molecular markers; 4. Effective host resistance screening based on pathogen variability; and 5. Improved cultural practices for disease control validated on farm.