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Selection of resistant and resistant varieties of local spring and summer monsoon heavy rainfall, planting rapeseed should be resistant to diseases, hard stalk, lodging resistance strong varieties, in order to improve field ventilation and light transmission, reduce the incidence.
Rotation is promoted to promote the rotation of rape, wheat, and broad bean crops for more than two years in order to reduce field germs.
During the flowering period of a row of rapeseed in the excavation field, the temperature rises, and the local annual rainfall is relatively high, which is conducive to the occurrence and harm of Sclerotinia. We must pay attention to cleanliness, smooth drainage, and do the rain.
Proper sowing promotes proper late planting of early maturing varieties and normal sowing of late maturing varieties. Late varieties such as Qinyou 10, Shi Lifeng, and Shi Lijia are planted around September 20, and early mature varieties such as Huayouza 6 and Huayouza 9 can be planted one week later, but no later than September 30th. Delayed sowing, rape Sclerotinia disease, although reduced, but production fell.
The investigation of increasing nitrogen application rate of seedlings indicated that the occurrence of S. sclerotiorum in early failure sapling rape field was heavy, and that sclerotia sclerotiorum in rapeseed field was light. In a normal growing field, spraying 3 to 4 kg of urea per acre at the flowering stage of rapeseed has a significant effect on reducing disease occurrence.
Intensify Cultivation Management to Prevent and Control Sclerotinia Sclerotinia
Rape is the main oil crop in the country, and it often causes serious damage due to Sclerotinia. The production practices and experimental results in recent years have shown that, while adhering to chemical control, adopting reasonable agricultural measures can mitigate the occurrence of Sclerotinia sclerotiorum to some extent.