In the period of time when the crop is applied with pesticides , the time period during which the pesticide is applied is the best. It is desirable to apply the pesticide at a favorable time depending on the climatic characteristics and the day and night activity of the pest. The time for applying the pesticide is preferably from 9:00 am to 10:00 am and after 4:00 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 popular. At this time, the application of the drug will not affect the control effect due to the dew dilution of the liquid, and it can directly contact the pests with the pesticides, increasing the chance of poisoning the pests. After 4 pm, the sun is westward, the light is weakened, the temperature is lowered, and it is the time when the flying activities and the night-time pests are about to be dispatched at dusk. At this time, the medicine can be applied to the crops in advance, and the pests are It can be exposed to venom or feeding poisoning when it comes out at dusk or at night, and it can also avoid evaporation loss and photolysis failure.
In addition, in the application of pesticides in crops, according to the hazardous parts of the pests, different medicines and different application methods should be used to deliver the medicines in place. For pests that harm the roots, the pesticide is applied to the roots or applied to the seeding ditch; the pests that feed on the back of the leaves are sprayed on the opposite side of the leaves; the control of the red bollworm and the cotton bollworm To the flower buds, the green bells and the group tips; to prevent the mites from causing the dead seedlings to smear the soil; to prevent the white spikes from spraying or pouring; to control the rice planthoppers and the rice leaf mites to spray the liquid to the base of the rice plants; Control the Spodoptera litura to spray the liquid onto the flower buds and young pods. In addition, concealed pests such as cotton aphid, red spider, rice planthopper, and rice leafhopper can be absorbed by Other sucking insecticides and transmitted to other parts of the plant according to their sucking mouth feeding method. , to achieve the purpose of delivering drugs in place. Only when the insects are applied and the medicine is delivered in place, can we grasp the weaknesses, hit the key points, and achieve the effect of removing the medicine to the insects, so that the medicine can play the best role and obtain the ideal insecticidal effect.
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