1. Timely medication According to the climate characteristics and the law of day and night activities of pests, choose to apply the medicine at favorable time. After application, it will be applied when it rains or rains. The pesticide will be washed away by rain. On a sunny morning, due to the dew on the leaves of the crop, it will dilute the liquidity of the dilute solution and reduce the effect of prevention and control. At noon on sunny days (especially In summer, the temperature is high and the light is strong. When it is applied, it will cause evaporation loss and failure of strong light irradiation. Sunrise pests such as cabbage butterfly, cotton leafhopper, bridgeworm, rice blast, etc. all prefer to be active during daylight hours. The eggs of the scorpion mites are the most abundant in the morning; most of the pests are nocturnal, prefer to be active at night, and have obvious phototropism. It is generally appropriate to apply the medicine after 9-10 am and 4 pm, because After 9:00 am, the dew on the crop leaves has dried up, and it is the time when the sunrise pest activity is the most prosperous. At this time, the application of the drug will not affect the control effect due to the dilute liquid, and the pests will be in direct contact with the pesticide. Increase the chance of pest poisoning. After 4 pm, the sun is westward, the light is weakened, and the temperature is lowered. It is the time when the flying activities and the nighttime pests are about to be dispatched at dusk. At this time, the medicine can be applied to the crops in advance. On the other hand, the pests are poisoned and killed after contact with the liquid or feeding after they come out at dusk and at night. At the same time, it can avoid the evaporation loss and photolysis failure of the liquid.
2, the drug is in place according to the pest's harmful parts, choose different drugs and different application methods. For pests that endanger the roots, such as root mites, the agent should be applied to the roots or applied to the seeding ditch; for pests such as cotton aphid and spider mites that feed on the back of the leaves, the liquid should be sprayed on the back of the leaves; The control of red bollworm and cotton bollworm should be carried out on the flower buds, the green bells and the group tips; the control of the mites causes the dead seedlings to be poisoned; the control of the scorpion moth should be sprayed on the fruits; Spray the liquid onto the flower buds and the young apples. In addition, for concealed pests such as cotton aphid and spider mites, depending on the feeding method of the sucking mouthparts, it is possible to use the highly potent insecticide to coat the stem or spray the leaf, and then pass it through the stem and leaf to the other parts of the plant. , to achieve the purpose of delivering drugs in place.
2, the drug is in place according to the pest's harmful parts, choose different drugs and different application methods. For pests that endanger the roots, such as root mites, the agent should be applied to the roots or applied to the seeding ditch; for pests such as cotton aphid and spider mites that feed on the back of the leaves, the liquid should be sprayed on the back of the leaves; The control of red bollworm and cotton bollworm should be carried out on the flower buds, the green bells and the group tips; the control of the mites causes the dead seedlings to be poisoned; the control of the scorpion moth should be sprayed on the fruits; Spray the liquid onto the flower buds and the young apples. In addition, for concealed pests such as cotton aphid and spider mites, depending on the feeding method of the sucking mouthparts, it is possible to use the highly potent insecticide to coat the stem or spray the leaf, and then pass it through the stem and leaf to the other parts of the plant. , to achieve the purpose of delivering drugs in place.
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