The spring corn aphids belong to the order Homoptera, Polygonaceae, which mainly harm corn, sorghum, wheat, millet and other crops. During the seedling stage, the locusts clustered on the back of the leaves and the leaves damaged. Light causes poor corn growth. When severely damaged, plant growth stagnates and even dead seedlings. In addition, corn dwarf mosaic virus disease can also be transmitted, resulting in varying degrees of reduced production. Specific prevention and control methods: First, we must pay attention to when the number of corn seedling grass black spider, ladybug, food fly, grasshopper is large, try to avoid chemical control or use of pesticides harmless to natural enemies. The second is to prevent and control locusts before they occur. Use 40 Dimethoate EC or 80% dichlorvos EC 1500-2000 times fluid; or BT emulsion 200 mL per 667 square meters, 30 kg water; or 25% diflubenzuron 3x suspension 1000 times; or 50% resistant蚜 WP 3000 ~ 5000 times liquid. Root zone application. Using 30% carbofuran granules, 10~15 kg per 667 m2 of mixed soil, grasping the initial stage of corn sorghum, burying in the ditch around the root zone of the plant, and the efficacy can be as long as 30 days.
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