Plastic film peanuts tend to prematurely decline in the late growth stage, resulting in a decrease in the fruit-filling rate, resulting in reduced yields. Therefore, in the peanut production process, we must pay attention to observation, find problems, and solve them in time so as to avoid unnecessary losses.
1, de-fertilizer. Due to the accelerated decomposition of cover film fertilizers, they were absorbed more by the plants in the early stage, and they were easily deferred after the scabs were laid, especially for plots with poor soil fertility. Therefore, in the period of flowering and tying needles (crusting period), 20 kg of urea should be used for Mu, and the water should be used as a relay fertilizer. It is also possible to spray the foliar fertilizer 2-3 times, and a mixture of urea and potassium dihydrogen phosphate may be used, or sprayed with Po, etc., after 4 pm. 2, lack of water. When the soil moisture content is insufficient, especially around noon in summer, the plants will appear temporary wilting and cause premature aging. Watering should be carried out in the evening and soil should be kept in shallow rows.
3, disease. The main disease of peanuts is leaf spot disease. It has many rains, high humidity and easy incidence. It forms brown or dark brown spots on the leaves. In severe cases, it also infects the petioles and stems, which usually occurs in the middle and late stages. Spray 50% Carbendazim WP 800-1000x, 50% Mancozeb 500x, 70% Thiophanate-methyl 1000x, or 75% chlorothalonil WP before and during the onset 600 times liquid. 7-10 days, even spray 3 times, pay attention to rotation medication.
4, lodging. For the plots with high soil fertility and good water and fertilizer conditions, the plants grow vigorously and prone to lodging, and the leaves attached to the ground will turn yellow and rot, seriously affecting the premature aging caused by ventilation, light transmission and photosynthesis. In the fruit when the needle into the soil than 50 grams per mu, spraying 50 kg of water. In the early stage of scarring (ie, when the second batch of fruit needles is buried in the soil), 15% paclobutrazol wettable powder (35-40 g) can be applied to spray 35-40 kg of water.
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