Sclerotinia sclerotiorum is a major disease in rapeseed production. It can occur during the whole growth period of rapeseed, and takes the heaviest time from flowering to fruiting. Once it occurs, it can lead to a 10-20% reduction in production, which has a great impact on production. Therefore, grasping the prevention and treatment of Sclerotinia sclerotiorum in spring is an important measure to win the harvest of high yield in rapeseed.
First, the prevention and treatment time: Rape flowering to fruiting period;
Second, prevention and control measures:
1. Drain the drains in the gutters, drain the gutters in time, make the rain ditch dry, increase the permeability of the soil, enhance the vitality of rapeseed roots, and improve the lodging resistance.
2. Remove yellow leaves from the lower part of the plant to improve ventilation and light transmission.
3. Chemical control: Each agent is controlled once in the period between flowering and flowering, 80% thiophanate-methyl or 80% carbendazim or 40% sclerotium net 500 times liquid is sprayed. When spraying, liquid medicine should be sprayed as far as possible. Plants on the lower stems and leaves.
4. In order to improve the seed setting rate of rapeseed, it can be used in combination with spraying. The mu should be sprayed with 0.1-0.2 kg of borax and 50 kg of water to prevent the rape from being "flowery but not real".
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