Factors affecting sclerotinia stem rot infections in canola
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Key messages 1. When conditions are ideal for canola, over half of the Sclerotinia sclerotiorum lesions can be removed from the stubble following Harvest Weed Seed Control (HWSC) guidelines. 2. The numbers of sclerotes left in the soil following a badly infected sclerotinia stem rot crop is highly variable, but can be significant in patches. Rotation of canola with non-host crops is therefore recommended. 3. Even in a dry and late start to the season sclerotinia stem rot infection was recorded in up to 10% of plants, however the severity of infection and subsequent yield loss was less. 4. It is estimated that, if a better understanding of factors affecting sclerotinia stem rot infection of canola led to improved management of the disease and an increase in yield, by as little as 1%, then the benefits to WA grain growers will be close to $1.5 million per annum.
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Bennett, Sarita ; Derbyshire, Mark; Michael, Pippa; Denton-Giles, Matthew; Lui, king yin; Thomson, linda (2019)Key messages • Preconditioning temperatures between 35 and 50°C for 30 to 60 days increases sclerotia germination to 80%, compared to with no preconditioning • Sclerotinia stem rot infections were low in field trials ...
Using a systems approach to investigate the efficacy of a disease rating system for Sclerotinia stem rot in canolaBennett, Sarita; Rijal Lamichhane, Ashmita; Michael, Pippa (2022)Sclerotinia stem rot (SSR), caused by the necrotrophic fungus Sclerotinia sclerotiorum, is a major, but unpredictable disease of canola in Australia. However, there is no disease rating system for current canola varieties. ...
Impact of fungicide application and host genotype on susceptibility of brassica napus to sclerotinia stem rot across the south-western australian grain belt: A genotype × environment × management studyBennett, Sarita ; Lamichhane, Ashmita; Thomson, Linda; Lui, King Yin; Michael, Pippa (2021)Sclerotinia stem rot (SSR), caused by the necrotroph Sclerotinia sclerotiorum Lib. (de Bary), is a major disease of canola in Australia, greatly reducing yields in high infection years. This study investigated genotype ...