blossom blight - Canadian Agronomist

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16 May Temperature and leaf wetness impact blossom blight in alfalfa

Posted at 17:23h in Disease

The optimum conditions for infection by Botrytis cinerea, the most common pathogen causing blossom blight in alfalfa in Canada, was a temperature between 15C and 20C with 12 to 24 hours of surface leaf wetness at flowering. Alfalfa seed production on the Prairies can be impacted...

20 Oct Blossom blight of alfalfa is common in most years

Posted at 20:03h in Disease

Surveys of alfalfa seed production fields on the Canadian Prairies from 1993 to 2017 demonstrated that epidemics of blossom blight caused by Botrytis cinerea Pers. and Sclerotinia sclerotiorum (Lib.) de Bary developed almost every year at some locations. It appears likely that blossom blight continues...