Integrated Control of Peanut Fusarium Wilt covered with plastic Film in early Spring

Peanut wilt includes many diseases, such as blight, root rot, white silk disease, stem rot and so on, which seriously affect the production of peanut covered with plastic film in early spring. First, the common characteristics of the disease are that the stems or leaves of peanuts wither and become discolored and necrotic. In general, the disease is serious in the continuous cropping land and the land with poor soil quality, and the disease is light in the land with high fertility and good soil quality. During the flowering period, the disease is serious in high temperature and heavy rain, especially when it clears up after the rain, the infected peanut seedlings will soon wither and die. Second, prevention and control methods for the prevention and control of this kind of disease, it is best to implement the method of prevention and comprehensive control. 1. Selecting disease-free seeds and disease-resistant varieties should remove mildew, discoloration, injured and shrivelled seeds before sowing, select disease-free and full seeds, and pay attention to selecting disease-resistant varieties, such as Wanhua No. 2, which is resistant to green and withered. 2. The plots with light incidence of rotation can be rotated every other year to adapt to the characteristics of peanut like new soil, the seriously affected plots should replant peanuts every 2-3 years, and flood-drought rotation can be carried out if conditions permit. 3. Deep ploughing and improving soil, applying net fertilizer to shallow sandy soil, it is necessary to deeply increase fertilizer and cultivate fertility, so as to create good growth conditions for plants and enhance plant resistance. At the same time, deep ploughing can bury sclerotia and reduce the source of bacteria. The application of organic fertilizer should be retted to make it mature and try not to apply bacteria-carrying fertilizer. 4. When applying plant ash and lime to prepare the soil before sowing, applying plant ash 50kg / mu and lime 25kg / mu can not only enhance the disease resistance of strong plants, but also kill germs and achieve the purpose of disease prevention. It can be applied again at flowering stage. 5. The seed can be mixed or soaked with 50% carbendazim wettable powder, and the dosage is 1% of the seed weight. After emergence, pay attention to check, find diseased plants, pull up the roots in time, take them out of the field, concentrate on treatment, and prevent spread. Alternate irrigation of water with carbendazim glue suspension and agricultural streptomycin, about 250 grams per cup, to control bacteria and nearby healthy plants without disease.