To use pesticides to control crop pests, in order to achieve the best insecticidal effect, it is necessary to select the right medicines and appropriate medicines, and at the same time, according to the factors affecting the efficacy of the medicines, pay attention to solve the problem of timely application and delivery of medicines. The problem. When applying pesticides, do the following two things:
First, according to the characteristics of the climate and the law of day and night activities of pests, choose to apply the medicine at a favorable time.
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 dilute of the liquid, and it can directly contact the pests with the pesticide and increase the chance of poisoning the pest. After 4 pm, the light is weakened, and it is the time when the flying activities and the night-time pests are about to be dispatched. At this time, the medicine can be applied to the crops in advance, when the pests come out at dusk and at night or when feeding. It can be exposed to venom or feeding poisoning, and it can also avoid evaporation loss and photolysis failure.
Second, according to the pest's harmful parts, choose different medicines and adopt different application methods to deliver the medicine in place.
For pests that are harmful to the roots, the agent 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.
This article URL: What are the precautions for agricultural pesticides?
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