Author: Xiong Fei Sclerotinia area is one of the largest in recent years, the most serious harm to the occurrence of disease on oilseed rape. In the year of major outbreak, rapeseed yield loss is generally above 20%, and rapeseed oil yield and quality will also be significantly affected. According to many years of observation, the severity of Sclerotinia sclerotiorum is most closely related to the flowering climate of rapeseed. Rainy days during the flowering period and high humidity in the field significantly increased the incidence. This year, when rape is in its flowering stage, it is at a low temperature, rainy weather and high humidity, which is extremely beneficial to the occurrence and spread of Sclerotinia sclerotiorum. The existing agents for the prevention and treatment of rapeseed sclerotinia are mostly protective agents, and they mainly play a preventive role. If the best time is missed, the control effect will be significantly reduced. Therefore, all localities should attach great importance to catching good weather and applying pesticides in time to effectively control the risk of sclerotinia. In the past, carbendazim and thiophanate-methyl were mainly used to control Sclerotinia sclerotiorum. Since these agents have been used for many years, the bacteria have developed resistance to them, so they should use other new high-potency agents. At present, the effective agents for preventing and curing rapeseed sclerotinia are: 50% scroking (or sclerotium) WP, the amount of mu is 80--100g, 25% of the fresh oil, 30--40 mu Grams; 2% of grams of bacteria grams of grams of agent, the amount of 120--180 ml acres. The best time for spraying is: spraying once in the early flowering period, and spraying once every 7-10 days. In the year of major occurrence, it should be supplemented again at the end of full bloom or final flowering period. Pharmacy should be sprayed on the lower part of the rape. In the prevention and treatment of Sclerotinia sclerotiorum, a small amount of “Sonic Boron†(or borax) can be added to the liquid medicine, and rapeseed flowers can be controlled at the same time. In addition, at the same time as the prevention and control of drugs to take down the old leaves, ditch drainage and other measures to improve the ventilation and light in the field, reduce air humidity in the field, can significantly improve the control effect on sclerotinia.
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