Four points should be grasped in the late stage of high yield of peanuts.

Peanut from 50% of the plants appeared full to most pods mature and harvested as its late growth stage. The growth characteristics of this period are as follows: the vegetative growth gradually declined and stopped, the pods became full gradually, and the increased fruit weight generally accounted for 500%-70% of the total fruit weight, which was the main period for the formation of pod yield. The technical measures of field management in this period are as follows: first, extra-root fertilization to protect the top leaf. The absorption of nitrogen, phosphorus and potassium in the late growth stage of peanut accounted for 6.3%, 5.3% and 0.75% of the total absorption during the whole growth period, respectively. Although peanut needed less nutrients during this period, it had a great impact on the formation of yield and the improvement of pod plumpness. The absorption capacity of peanut roots decreased in the later stage, and in order to make up for the lack of fertilizer supply, from the late pod-setting stage, 1%-2% urea and 2%-3% calcium superphosphate aqueous solution were sprayed 2-3 times every 7-10 days, 50 kg per mu each time, in order to prolong the functional period of the top leaf and improve the fullness rate of pods. Second, watering and satiating the fruit in case of drought. In the later stage of peanut growth, the suitable soil moisture is 50%-60% of the maximum field capacity. In this period, if drought occurs, the root system is prone to decline, and quickly cause top leaf shedding, stem and branch withering, reducing full fruit rate, resulting in reduced yield. Therefore, when the soil moisture is less than 40%, it should be watered immediately to protect the roots and leaves, improve the satiety rate, and irrigate in small ditches or sprinklers when watering, and avoid flooding. Third, timely drainage and prevention of rotten fruit. In the later stage of peanut growth, if there is too much autumn rain and poor drainage, it is easy to cause root rot, and when it is serious, the pods will rot or sprout. Therefore, when there are too many Rain Water in the later growth period, the ditches should be dredged in time to eliminate stagnant water and waterlogging in order to ensure high quality and high yield. Fourth, control leaf spot disease and grubs. The main disease in the late growth stage of peanut is leaf spot, the peak of which is 20-30 days before harvest, and the occurrence of high temperature and humidity or continuous overcast and rain is serious. You can choose 75% chlorothalonil wettable powder 600x liquid or 70% methyl thiophanate wettable powder 1000 times liquid spray control, spray once every 10 to 15 days, even 2 times for 3 times. For serious grub fields, 50% phoxim EC 1500 times liquid can be used for heap control, with 50 grams of medicine solution per hole, and the control effect of watering is better after irrigation. In addition, should pay special attention to, peanuts are oil crops, in the prevention and control of grubs, it is strictly prohibited to use 3911, methamidophos, 1605 and other highly toxic pesticides, so as not to affect human health.