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Pesticide | Poor insecticidal effect? Is your pesticide really right?

A crop insecticide, when used, the insecticidal effect is often very good, but as the dosage continues to increase and the scope of use continues to expand, cases of increased resistance have emerged. Increasing the insecticidal effect of pesticides is conducive to promoting high agricultural yield, reducing production costs and improving economic efficiency. So, what can be done to improve the effect of pesticides?
1, timely medication
The whole growth period of pests is generally divided into four stages: adult, egg, cockroach and larva. The eggs, cockroaches and old larvae have strong resistance to medicine. Therefore, it is necessary to pay close attention to the larvae before the third age and the nymphal period, when the drug resistance is weak, it is beneficial to improve the drug effect.
2, moderate medication
1, the amount of medication should not be too much.
2, the concentration of the drug solution can not be too high or too low. Too high will cause poisoning of humans and animals, causing phytotoxicity to crops. Too low insecticidal effect. Strictly follow the instructions on the pesticide label, add water to prepare pesticides can not be "whatever you want" or careless.
3, symptomatic medication for sucking mouthparts pests
(such as aphids, spider mites) to choose systemic pesticides. For chewing mouthparts, it is better to use stomach-toxic pesticides. Some pesticides, although having various functions such as stomach poisoning, systemic absorption, and fumigation, can prevent and control a variety of pests, but for different pests, there are still different effects, such as speed and height. Therefore, it should still be clear and reasonable.
4, rice fields should be kept in shallow water
First, there is water in the field, pesticides fall into the water, forming a layer of "medicine film", some pests, such as rice planthoppers, jumped into the field in case of surprise, floating on the surface of the water, encountering the drug film, and poisoning again.
Second, the aphids are harmed by drilling into the stem at the base of the stem of the rice near the surface of the stem. There is water in the field, and the tension of the water is used to allow the liquid to enter the wormhole and improve the killing effect.
Third, after some pests are poisoned, fainting into the water will not only cause secondary poisoning, but also drowning to prevent reincarnation. Fourth, there is shallow water in the field. The sunny water temperature is higher than the temperature, which can increase the volatile amount of volatile pesticides such as dichlorvos, which is beneficial to improve the "fumigation" insecticidal effect.
5, spraying pesticides should be in the dew, after the rain is dry, the droplets should be fine
Do not spray at high temperatures at noon. Therefore, when the pests are mostly hidden and inactive, the liquid will soon dry up, the insecticidal effect is poor, and it is easy to cause poisoning and phytotoxicity of humans and animals. For pests hidden in the lower part of the stem of the plant, such as rice planthopper, it is better to pour the pesticide with water. In order to let the syrup flow to the lower part and the pests, the insecticidal effect is enhanced.
In addition, it is necessary to pay attention to the rotation of drugs to prevent pests from developing resistance. Rationally mix pesticides and treat multiple pests. Do not use hard water to prepare pesticides. Before using the drug, the sprayer should be cleaned, etc., all of which are important for improving the insecticidal effect of pesticides.
Pay attention to the time of medication: Do not use at high temperature or rain. High temperature increases the amount of evaporation and reduces the efficacy. When it rains, it will release the concentration of the drug and reduce the drug effect. (Source: