1) Living habits: The rice planthoppers of Henan Province migrated from the southern rice area and there are three types of brown planthoppers, brown planthoppers and white-backed planthoppers. In general, SBPH and S. furcifera are relatively lightly damaged, occur during the mid-to-middle stage of rice growth, and have similar time to the occurrence of rice leaf roller, and can be controlled while controlling rice leaf roller. In some years, the most serious damage to rice during the late growth period is brown planthopper. The worms have a habit of colonization. Adults and larvae eat the sweat from the lower part of the rice stalks, and at the same time discharge a large amount of sugar-containing toxic mucus, which makes the base of the rice stalks dark and the leaves yellow and dry. The adult phototaxis is strong, preferring to lay eggs on the tender green and damp grasses and in the lower leaf sheaths and tender stem tissues. A female can lay 200 eggs - 300 grains. Rich food, high humidity in the field, temperature 25--30. C, is conducive to spawning, hatching and survival of larvae. Infestation occurs mostly in the form of flake-like phenomena, first in the lower part and soon in the outbreak. (2) Control methods: 1) Agricultural control: 1. During the middle and late stages of rice growth, field observation and investigation should be strengthened. When a quantity of individual spots is found to be harmed, it is necessary to pay attention to the initial application of the pesticide. 2. Strengthen the management of water and fertilizer so that the rice shoots are green but not prosperous, and seedlings are allowed to grow in the field to increase the resistance of rice plants and keep the rice fields moist and ventilated, so as to reduce the damage of rice planthoppers. 3, timely removal of grass field weeds and weeds, in order to help control the occurrence and development of rice planthoppers. 4. To encourage ducks in rice fields to effectively control rice planthoppers and other pests. 2) Pesticide control: 25% of mufufen wet powder 25 grams - 35 grams, add 50 kg of water spray; or 25% of the double insecticide 200 grams - 250, add 50 kg of water spray; or 50% of the Methamidophos 50 grams. Add 50 kg of water to the spray; or 75% of Ye Yu San's wettable powder, 20 g to 25 g, add 50 kg of water to the lower part of the rice plant to spray, keep the shallow water layer in the field, or use 45% of the amine phosphorus 100 g for the mu-- 150 grams, plus 25 kilograms of fines in the field after the discharge of water, in addition, there are dimethoate, mixed aldicarb powder, instant eradication Wei powder, dichlorvos and other pesticides can be used to control. China Agricultural Network Editor
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