1, anti-adult. Fertilizers, which are plant growth regulators, can inhibit vegetative growth, promote reproductive growth, and coordinate vegetative growth and reproduction in a peanut field with high soil fertility, good fertilizer and water conditions, and prosperous plant growth. The relationship between growth. There are three kinds of plant growth regulators suitable for spraying on peanuts, than long, chlormequat, paclobutrazol. The dosage of mu was: 50 kg per 50 grams of water for a long period of time; 50 grams of water for 100 grams of chlorella; 15% of paclobutrazol 35 grams of water and 35 kg of water. Spraying time is generally at the beginning of the scarring. 2, prevent premature aging. Maintaining the full fruit period green leaf area and maintaining the physiological function of the leaves is an important relationship to increase fruit number and increase yield. In production, the problem is often that the leaf area and photosynthetic productivity fall sharply at the same time after fruiting, and dry matter accumulation has dropped to a very low level and premature aging has occurred. General reduction of 20-30%. To prevent premature senescence, the foliar spray is usually applied at the stage of pod till the fruit is full. 75-100 kg of fertilizer per acre (including 0.2% of potassium dihydrogen phosphate, 2% of superphosphate, weaker plant growth, and 1%-2% of urea added to the land with yellow leaves), every 7-10 Spray once a day, usually two times, after 4 pm. At the same time, it is necessary to pay attention to timely irrigation under drought conditions to promote the prevention of premature aging. 3, pest prevention. The main disease of peanuts is leaf spot disease. Leaf spot disease is a kind of fungal disease. It can be caused by high temperature and humidity or continuous rainy weather. The symptoms are brown or black spots on the leaves and petiole and stems in severe cases. Generally in the middle and late period, there will be about 25% reduction in production. In the prevention and control of the principle of prevention and treatment of small, early cure, once the prevention and treatment as soon as possible. In addition to strengthening field management, promoting robust growth of peanuts, and strengthening disease resistance, it is also possible to use agents for control. Insect pests of peanut mainly include aphids and cockroaches. Aphids occur during the whole growth period. It not only affects the normal growth of peanuts, but also causes a reduction in production due to infection with peanut viruses. When it occurs, it is sprayed with 40% dimethoate emulsion 1000 times solution and methamidophos 1000 times solution. The prevention and control method for earthworms: In late June and early July, the water is sprayed with 800-1000 times of amines of phosphorothiosulfuron to control their adult pests. A severe plot of plutonium can be irrigated with 500-700 times of phoxim, and the effect of irrigation before rain is better. (Cui Lijun, Department of Grain and Oil Crops, Agricultural Bureau of Hebei Province)
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