Preventing the growth of peanuts during the fruit-filling period, the vegetative growth gradually decreases, the nutrients are transferred to the pods, and the dry matter accumulates rapidly. However, due to various reasons such as temperature, rain, light and excessive application of nitrogen fertilizer, the stems and leaves of peanuts are long, prematurely sealed, closed in the field, consume a lot of nutrients, inhibit the accumulation of dry matter and affect the yield. Therefore, for peanuts with a long trend, measures should be taken to inhibit vegetative growth and promote reproductive growth, which has a significant effect on increasing peanut yield.
To prevent premature aging from premature aging caused by lack of fertilizer, spray 0.3%~0.4% potassium dihydrogen phosphate plus 1% urea solution 50 kg outside the root of the pod to the full fruit period. The spraying time is best in the sunny afternoon. After 4 o'clock, spray once every 10 days, usually 2 to 3 times.
Prevent stagnant water In the late stage of peanut growth, peanut fields must not accumulate water. In case of rain or even rain, it should be drained in time to prevent water accumulation, so that the humidity in the field is too large, causing long stems and leaves, poor soil ventilation, affecting the roots and pods, and easily causing a lot of rotten fruit or germination, reducing yield and quality. When planting peanuts on plots with high groundwater levels, it is necessary to implement high ridge cultivation or digging drains to lower the water level.
Prevention of pests and diseases The main disease in the late stage of peanut is leaf spot disease. In prevention and treatment, it should be sprayed 1~2 times 1:1:300 times Bordeaux mixture for prevention before onset. In the early stage of the disease, 50% carbendazim WP 800 times solution can be used for prevention and treatment. The main pests in the late stage of peanuts are underground pests dominated by alfalfa, which should be controlled in time. In the later stage, aphids occur. When the rate of insects reaches 5% or more, they can be sprayed with 10% imidacloprid wettable powder.
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