In addition to endangering corn, corn red spider also harms cotton, beans, peanuts, melons, weeds, etc., and the sap and leaf sap are sucked back and forth by the plants of Cheng or Ruo, and the plague spots or streaks appear in the damaged parts. The entire leaf turns white and dry. After the maize emerged, the red spider that harmed the weeds gradually transferred to the corn field. From July to August, it is a period of endangerment. First, it will occur in the corn field and will rapidly spread to all fields in suitable weather conditions.
Light rain in July-August is beneficial to its occurrence and spread, but heavy rain, heavy rain, or excessive temperatures will inhibit its reproduction. Sandy soil corn fields are heavier than other soil quality corn fields.
Agricultural control: timely and thoroughly remove the weeds in the fields, land and canals, reduce the food and breeding sites of corn spider mites, reduce the number of insects, and prevent them from being transferred to the fields; avoid intercropping with crops such as beans and peanuts to prevent them Transfer hazards to each other.
Chemical control: focus on spraying the lower leaves. Optional 15% broom net 3000 times liquid, or 40% omethoate 1000 to 1500 times liquid, or 15% broom net and 40% omethoate 1:1 ratio of mixed spray, or 1 per mu ~ 1.5 kg of phorate-containing phosphatic or phorate-containing EC mixed with appropriate amount of fine sand interspersed evenly between corn rows.
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