To connect the shallow water layer. First, there is water in the middle of the field. The pesticide falls into the water and forms a film. Some pests, such as rice planthoppers, jump into the field when they are shocked. They float on the surface of the water and encounter poisonous membranes. Second, the locust is being drilled into the stem near the surface of the stem of the rice stem. There is water in the field, the tension of the water is manipulated, and the liquid is allowed to enter the wormhole, which improves the killing result. Third, after some pests are poisoned, they fall into the water, not only secondary poisoning, but also can kill the top and prevent resurrection. Fourth, there is shallow water in the field. The temperature of the sky is higher than the temperature, which can increase the volatilization of volatile pesticides such as dichlorvos, which is beneficial to improve the fumigating and insecticidal effects.
(1) When ordering medication
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For sucking mouthparts pests, urea has smelled down the smell of liquid ammonia?! (such as aphids, leafhoppers) to choose systemic pesticides. For the taste-type oral pesticides, it is better to use stomach-toxic pesticides. Some pesticides, although having a variety of functions such as stomach poisoning, systemic absorption, and phosphorus fertilizer fumigation, can prevent and control a variety of pests, but for divergent pests, there are still rapid effects and unevenness. Therefore, it should still be clear and reasonable.
First, the amount of medication is not too much or too little. Second, the concentration of the drug solution is not too high or too low. Too high will cause poisoning of humans and animals, and cause phytotoxicity to farmers. Poor insecticidal results. To be strict in accordance with the declaration on the pesticide label, adding water to prepare pesticides is not arbitrary or careless.
(2) Spraying pesticides
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(3) Rice field application
Increasing the pesticide killing results is beneficial to promoting high agricultural yield, reducing production costs and improving economic efficiency. The following five points must be done:
The whole growth period of pests is generally divided into adult, egg, cockroach, and long worms. Eggs, cockroaches, and old mature worms have strong resistance to drugs. Therefore, it is necessary to relax before the third instar and the nymphal period of the larvae, and to apply the medicine when the drug resistance is weak, which is beneficial to improve the efficacy.
(4) Moderate medication
To be dewdrop, after the rain has dried, the droplets should be fine. Do not spray at high temperatures in the middle of the night. Therefore, when the pests are hidden, the liquid will soon dry up, the insecticidal results are poor, and it is easy to cause poisoning and phytotoxicity of humans and animals. For the pests that are hiding in the lower part of the stem of the plant, such as rice planthopper, it is better to add water to the pesticide. In order to let the syrup flow to the lower part and the pests, the insecticidal effect is enhanced. In addition, 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 and cleaned, etc., all of which are important for improving the pesticide killing results.
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