Mung bean pest: control method of vegetable aphid

① insect-resistant varieties in the same kind of vegetables, different varieties have different insect resistance. Such as some hairy varieties, aphids do not like to eat, various places can be selected according to the situation. ② cleans the field many times in time to remove weeds, especially in early spring and late autumn, which can eliminate many insect sources. During the growing period, the seedlings with more insects should be pulled out in time to reduce the number of insects. Natural enemies of ③ there are many natural enemies of aphids, which should be protected and utilized. When using medicament to prevent and cure, we should use the medicine that harms the natural enemy as little as possible. The cultivation of ④ screen seedlings with gauze wind can prevent the invasion of aphids. ⑤ eliminates the overwintering insect source in overwintering spinach; cruciferous plants; peach trees and other aphids overwintering places, when the aphids have not yet migrated in spring, use strong pesticides to control and reduce the source of insects in the same year. In areas with developed production in protected areas, aphids must be eliminated in time to prevent overwintering aphids from moving into the field. Early sowing and early sowing in ⑥ can reduce the damage degree of aphids after the plant grows up. ⑦ silver gray film repels vegetable aphids has a negative tendency to silver gray. In the growing season of vegetables, silver gray plastic strips can be hung in the field, silver gray stents can be inserted, or silver gray mulching films can be applied to reduce the harm of aphids. ⑧ butter board aphids have a strong tendency to yellow. Some boards with a height of 60 cm and a width of 20 cm can be inserted in the field and coated with butter to kill aphids. ⑨ chemical control at present, the main control of aphids is chemical control. In chemical control, it should be based on the principle of early prevention. The commonly used drugs are 50% aphid mist wettable powder or water dispersible granule 2000 × 3000, which has special effect on vegetable aphid and does not harm natural enemies, or 50% malathion EC, or 20% diazinon EC, or 25% quinathion EC 1000 times each, or 40% dimethoate EC 1000 times 1500 times, or 50% dichlorvos EC 1000 times, or 70% dimethoate EC 2500 times, or 10.8% Caesar EC 10,000 times, 20000 times The above medicament spray. 22% fumigant can be used in the protected area, 0.5kg per mu (666.7 square meters), closed fumigation.