First, the main symptoms: brown lesions on the stems and leaves, in high humidity conditions, with the development of the disease, the diseased surface grow a lot of white cotton flocculent mycelium, severe root rot disease plant withered, later produced black Sclerotia. The optimum temperature for the occurrence of Sclerotinia sclerotiorum is about 20 degrees Celsius, and the relative humidity of the air is more than 85%.
Second, prevention and control technology:
1. Remove diseased plants in the shed to prevent pathogens from re-infection.
2. Strengthen humidity and reduce air humidity.
3, chemical control. Commonly used agents are quick-acting, sclerotin, net, multi-mildew, polysulfide suspension; in order to prevent the increase of air humidity, it is best to use dust or aerosols, such as 100 rot, fast Keling smoke agent.
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