In the late growth period of summer peanuts, if there is continuous rainy weather or continuous drought, or if rainwater is abundant and the temperature is high, leading to peanut plant growth, it will cause peanut peanut fruit dysplasia, directly affecting the yield and quality. Therefore, it is very important to strengthen the middle and late management of peanuts in the field. Summarized as "to prevent disease and control pests, control voicing only decline."
First, timely control of peanut leaf spot This period is a serious period of peanut leaf spot, a direct impact on the fullness of peanuts. Peanut leaf spot mainly includes brown spot, black spot, net blotch and focal spot. The agents for the control of peanut leaf spot mainly include 200 times the physical protective agent's high fat film, 120200 times the biological agent's agricultural resistance, and 400 times the marine biological agent's farm music No.1. The chemical agents are 1000 times of dibenzotriazol, 1000 times of chlorothalonil, 1500 times of diniconazole, 600 times of phyllozone II, 400 times of Bordeaux mixture, 400 times of mancozeb, and 75 kg per mu. Summer sowing and wheat set peanuts to maintain good leaves, especially for the increase in yield.
Second, the prevention and control of peanut pests in the middle and late stages of the growth of peanut pests are mainly bollworm and spider mites, with strong fulminant, a wide range of features. The third generation of cotton bollworm was responsible for wheat and peanuts, and the fourth generation was damaged by summer peanuts. The first to third instar larvae devoured young leaves and buds, entered the overeating period from the fourth instar, and had better control effects before the third instar. Red spiders are prone to happen in the late drought. The agents for controlling cotton bollworm mainly include: 50% phoxim emulsion or 2.5% emulsifiable milk 1500 times, and 20% methomyl 1200 times. The medicines used for the control of red spider are: 20% Guangkewei 1000 times liquid, 50% cotton bollard cream 800 times liquid and so on.
Third, control and prosperous soil rich in nitrogen fertilizer, in case of high temperature and rain, prone to leggy, when the peanut main stem reaches 40 cm, it should be controlled growth. The method is: use 15% paclobutrazol wet powder 25 kg water per mu, dubbed concentration of 100ppm solution, spraying the foliar evenly, pay attention to the application of the concentration can not be too high, otherwise it will cause defoliation and peanut rotten fruit. Or spray 25 kg per mu for 20 grams of Zhuangfan An.
Fourth, spraying leaf fertilizer with potassium dihydrogen phosphate 1 kg per mu to 200 grams of sugar, foliar spray. Or use 5% to 10% of the leaching liquid from the plant ash, spray 60 kg per mu, or use Tianda 2116 2 bags per mu, foliar spray.
In addition, if peanuts grow continuously during the late growth period, they must clear the drainage channels in time to avoid water accumulation in the fields and prevent premature aging.
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