First, according to the characteristics of climate and pests of day and night activities, choose to apply drugs at favorable times. The pesticide application time is appropriate from 9am to 10am and after 4pm. Because after 9:00 AM, the dew on the leaves of the crops has dried up, and it is also when the sunrise pests are most active. At this time, the application of pesticides will not affect the prevention and control effect due to dew liquid, but also allow direct contact between pests and pesticides, increasing the chance of pest poisoning. After 4 pm, the light weakened, and it was the time for flying activities and night-out pests. At this time, the pesticide can be applied to the crop in advance and the pests will come into contact with venom or feed poisoning when they are out of action or during feeding during the evening and night, and at the same time, evaporation losses and photolysis of the liquid medicine may also be avoided.
Second, according to the dangerous parts of pests, choose different medicines and adopt different methods of spraying, and send drugs in place. For pests that harm the roots, the pesticide is applied to the roots or in the sowing ditch. The pests that feed on the leaves are sprayed on the opposite side of the leaves. The control of the red bollworm and cotton bollworm is done with the drug. To the buds, bells, and on the tip of the group; prevention and control of aphids caused by dead heart seedlings to spread poisonous soil; prevention and control of white spikes on the spray or splashing; prevention of rice planthoppers, rice leafhoppers will spray liquid to the base of rice plants; Spodoptera litura sprayed liquid buds and larvae. In addition, hidden insects such as cotton aphid, red spider, rice planthopper, and rice leafhopper, etc., can be absorbed by insecticides with strong systemic absorption and transmitted to other parts of the plant according to their sucking and sucking mouthparts. To achieve the purpose of drug delivery.
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