Control of alternaria blight in oilseed rape ((Brassica napus var. oleifera DC) and turnip rape (Brassica rapa var. oleifera DC)

摘要

Comparison of the tested Altemaria blight control measures used at different times showed th at on average during the four experimental years in rape and turnip rape (in total 36 cases), tebuconazole and azoxistrobine were more effective than prochloraz - both products in 24 cases significantly increased seed yield (prochloraz - in 20 cases), average seed yield increase through azoxistrobine application was 406 kg ha-1, through tebuconazole application - 389 kg ha-1, and through prochloraz application296 kg ha-1. Altemaria blight tended to decline protein and fat contents in the seed of rape and turnip rape. The optimal application time of Alternaria blight control measures was determined to be at the end of flowering or later, when the first disease symptoms appear on siliques.