I. Peanut Bacterial Wilt Disease occurs most frequently during the seedling stage of peanut until the end of the harvest period. Spring peanuts range from May to June and summer peanuts range from September to October. The incidence rate is heavier. The susceptible plant initially had a soft sag in the parietal lobe, followed by wilting of the entire plant leaf, but the withered leaves remained greenish blue, and the stem was dissected. It could be seen that the transposed tissue near the ground part had turned brown and was handcuffed. At the point of the cut, the stained white bacteria flowed out, the diseased plant was pulled up, and the roots had rotted and turned dark brown. The prevention and control measures are as follows: 1. Rational rotation, and the implementation of a reasonable rotation with non-parasitic crops, such as peanuts and corn rotation can eliminate the bacteria in the soil; 2. Selection of disease-resistant varieties such as "white sand 1016 seeds"; 3 improve the soil, pay attention to drainage, When applying the organic fertilizer, when sowing peanuts, 667 square meters of planting wood ash 50kg ~ 150kg, 12% calcium magnesium phosphate 20kg ~ 30kg, can promote robust growth of peanuts, improve disease resistance; 4. Chemical control 1 when peanuts are sown, The use of green-enjoying one or fulvic acid seed dressing can effectively control the occurrence of peanut bacterial wilt. The application method is to use 1 g to 2 g of green savory or 2 g to 3 g of fulvic acid per kg of seeds, and mix it to sow. The control effect can reach 80% to 90%. 2 In the peanut seedling stage or the onset stage, it is sprayed with sand fungus king or everywhere gold 1000 times to 1500 times, the control effect is more than 90%, when the disease is heavy, 667 square meters use sand king or Filling the roots with 35g/15kg to 20kg of diluted liquid is very effective. Second, peanut leaf spot peanut leaf spot, there are two kinds of brown spot and black spot. During the growth of peanuts, it is common and the mixing takes place on the same plant or even on the same leaf. Brown spot occurred earlier and black spot occurred later. The prevention and control measures were as follows: 1. Strengthen field management, and timely remove crop residues after harvest to eliminate the source of the disease. 2. Reasonable fertilization, increase calcium magnesium fertilizer and potash fertilizer, in order to improve the disease resistance of peanuts. 3. Chemical control can control the spread of disease, maintain a long green leaf to help long-term, prolong photosynthesis time: 1 with sand fungus Wang 1500 times to 2000 times the liquid in the growth phase spray 2 to 3 times, interval 15 days ~ 20 days, the control effect can reach 93%; 2 in the seedling period 667 square meters with gold everywhere 0.5g water 15kg ~ 20kg, continuous spraying 3 to 4 times, each interval of 15 days to 20 days, the control effect of 95 More than %, at the same time, can prevent the occurrence of other diseases. In addition, the powerful anti-disease-increasing agents “Sand Kingâ€, “All Over Gold†and “Yellow Yeh Ching†have a certain preventive effect on the prevention of the occurrence of peanut virus disease. When the disease is controlled, such as bacterial wilt, leaf spot, etc., mixed spraying , Can enhance disease resistance, increase production more than 30%.
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