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Epidemiology of Rhyncosporium to improve barley risk assessment - AR0510

Leaf blotch (Rhynchosporium secalis) is the most damaging disease of winter barley in the UK and is a major cause of pesticide use. In 2000, the estimated value of yield and quality loss due to leaf blotch was £6.7M in England and Scotland, despite 95% of crops receiving fungicide applications with an average of 1.6 fungicide sprays per crop.
The objective of the proposed work is to develop an understanding of the role of plant architecture, weather and fungicide factors affecting disease spread and epidemic development. In this context, previously collected data from detailed experiments on the effect of fungicide on disease and development of epidemics warrant re-examination and analysis. Preliminary experiments to examine the effect of plant architecture on disease will also establish the importance of disease escape in this pathosystem. The proposed work will provide the basis to assess risk of severe epidemics, and will enable improvement in timing and application of fungicides, which will benefit the environment. By contributing to a more rational use of fungicides this work will promote sustainable barley production.
1. To test the effect of canopy expansion on optimum timings to minimise fungicide use, based on extant data (ADAS).
2. To quantify the spatial development of R. secalis infection based on existing data (IACR-Rothamsted).
3. To do preliminary work to assess the role of splash dispersal and disease escape in disease spread.
Project Documents
• Final Report : Final report   (510k)
Time-Scale and Cost
From: 2001

To: 2003

Cost: £146,159
Contractor / Funded Organisations
Rothamsted Research (BBSRC)
Arable Farming              
Cereal Production              
Sustainable Production              
Fields of Study
Arable Crops