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Controlling White Mould Disease through Microclimate Management

White mould of dry bean, caused by Sclerotinia sclerotiorum, is the leading constraint to bean production in Southern Alberta. Ascospores are the primary infective propagules of S. sclerotiorum. Several abiotic factors trigger the germination of sclerotia to produce apothecia, including light, high soil moisture, temperatures between 10-20oC, burial depth, and oxygen content of the soil. Due to the absence of any complete genetic resistance to this pathogen, microclimate within the canopy and prevailing environmental conditions are important determinants of white mould progression.

This research project seeks to determine whether microclimate management, provided by changes in irrigation scheduling and dry bean canopy architecture, could decrease the rate of ascospore release during the susceptible flowering period, without negatively affecting bean yield.

 

Theme: Genetic Improvement
Project Title: Dry bean improvement – Microclimate management for white mould disease control
Funding partners: Alberta Pulse Growers and Agriculture and Agri‐Food Canada
Research Team: Dr. Syama Chatterton – AAFC Lethbridge; Dr. Parthiba Balasubramanian – AAFC Lethbridge


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