How to prevent and cure peanut virus disease

Flower disease, one of the main diseases of peanut, seriously affects the yield and quality of peanut, especially in the northern production areas of our country. Peanut virus disease, except bud blight mainly transmitted by thrips, other diseases such as light mottle disease, yellow mosaic disease and common mosaic disease are transmitted by seeds and aphids. The seed transmission rate is mainly affected by the period of the disease, the disease is early and the seed transmission rate is high. The virus-carrying rate of seeds was negatively correlated with seed size. The virus-carrying rate of large seeds was low, while that of small seeds was high. In the presence of virus sources and susceptible varieties, the occurrence and number of aphids are the main factors for the prevalence of virus diseases. The aphids that transmit the virus are mainly winged aphids active in the field. In general, peanut aphids occur early and have a large number of aphids, which is easy to cause serious disease epidemic, otherwise the disease is mild. The peanut seedling stage has less rainfall, mild climate and dry climate, which can easily lead to the occurrence of aphids and the prevalence of diseases, and vice versa. Control methods: first, the use of non-toxic or low-toxic seeds to eliminate or reduce the source of primary infection. Non-toxic seeds can be obtained by isolation propagation. Second, Yuhua 1, Haihua 1, Yuhua 7 and other varieties with mild disease and low seed transmission rate were selected, and large kernel was selected as seed. The third is to popularize the plastic film mulching technology, which has a certain effect of expelling aphids and can reduce the harm of virus diseases. Fourth, timely removal of weeds in the field and around to reduce the source of aphids. Fifth, do a good job in disease quarantine and prohibit replanting from disease areas. Sixth, chemical control of aphids, sowing with 3% carbofuran granules to cover seeds, 2.5 kg-3 kg per mu, or 25% phoxim (812), 0.5 kg per mu, after peanut emergence, timely inspection, hairy aphids timely spraying with 40% dimethoate EC 800 times liquid, in order to put an end to aphid transmission.