Prevention and Control Technology of Peanut Aphid
I. Injury Peanuts can be damaged by the locusts from the time they are unearthed and harvested, but they are the most affected before and after the first flowering period. Mites are mostly concentrated on tender stems, petals, calyx tubes, and fruit needles. When the damage is severe, the growth of peanuts is stagnant, and the leaves curl, becoming smaller and thicker, affecting the photosynthesis and flowering of the leaves. After the locust occurrence, the branches and leaves of the whole peanut are black (the people call it oyster sauce), and there are few scars. Hey, even withered to death. Second, control methods The current prevention and control of peanut pods should pay attention to the protection of the use of natural enemies and the timely combination of chemical control measures 1. After the biological control of peanuts is unearthed, select early sowing, and approach 2 to 3 peanut fields that are overwintering and intermediate host plants. Use a five-point sampling method and investigate once every five days (3 days in June) until mid-July. only. Look for 20 peanuts per point, and count the amount of maggots and natural enemies. When the pass rate is 30%, Baiduan has more than 100 swarms. If the climate is suitable and the number of natural enemies is small, prevention and control should be carried out in time. In case of excessive rainfall, the relative humidity is over 85%, or the total number of natural enemies and the ratio of locusts is 1:40, the damage can be controlled without having to control it. 2. Chemical prevention (1) Toxic soil and arsenopyrite use 1.5% dimethoate powder or 2.5% trichlorfon 0.5 kg and fine dry soil (sand) 15 kg. In the morning and evening, when the leaves of the peanuts are closed, the peanuts are applied to the base of the peanut pier to make contact with the worm body as much as possible, and the killing effect is good. (2) Spray 40% omethoate EC 1000 times, or 50% Malathion EC 1000 to 1500 times, or 50% IPP 1500 to 2000 times, or 20% chlorbenzuron WP 2000 times liquid spray, can control the occurrence of peanut aphid. Organic grape seed extract is, as the name implies, extracted from the high-quality organic grape seed. We use an organic extraction solvent, which is extracted in strict accordance with the EU and USDA organic processing specifications. High content OPC extract is not added with any carrier, such as OPC 95% and OPC 98%.
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