It has entered the rainy season and has more rain, which is suitable for the growth of crops. However, with the gradual increase of temperature, the occurrence of pests and diseases on cotton, rice, pepper, edamame, corn and other crops has become more serious. How to effectively use pesticides to control pests and diseases of crops during the rainy season, the author introduces the following seven to farmers point.
First, the use of systemic pesticides systemic pesticides can enter the plant through the roots, stems, leaves and other parts of the plant, and transported to other parts, to play a poisoning effect in a certain period of time. More than 80% of the active ingredients are absorbed into the tissues by the crops 4-5 hours after the application of pesticides such as monocrotophos and omethoate, and 4-5 hours after the application of pesticides such as yam, carbendazim, rust, and leaf dry. It will not affect the efficacy of the rain.
Second, the use of fast-acting pesticides, dichlorvos, monocrotophos, methamidophos, chlorpyrifos, deltamethrin, etc. are quick-acting pesticides. These pesticides have a strong contact or killing effect, and the poisoning effect is rapid. After 1 to 2 hours, the pests can be killed.
3. Jinggangmycin in the selection of rain-tolerant pesticide fungicides has good rain resistance. After 1-2 hours of application, even if it encounters showers, it will not affect the effect.
4. Adding an adhesive adhesive to the drug solution can increase the adhesion ability of the pesticide on the surface of the plant and the pest. It is not easy to wash off the drug in the case of moderate rain after application, and improve the control effect of the pesticide from high. When preparing pesticides, add 50-70 grams of adhesive for every 50 kg of liquid medicine, such as washing powder, stir evenly, and use it in time after preparation, the effect is good.
Fifth, timely application of pesticides according to the life cycle and activity rules of pests. Regardless of the pest, the resistance during the larval period is weak, and the pest can be killed with a low concentration of the liquid. For some pests coming out at night, choose to apply the medicine in the evening, so that the medicine is quickly absorbed by the plants, and the pests come out for food within 2-3 hours, resulting in poisoning.
Sixth, look at the days before the application of drugs, pay attention to the dynamics of weather changes, and seize the gap after spraying the pesticide. Don't spray when you are going to rain or when it is raining.
7. Improve the application method. Select systemic insecticides to occur in pests. The fine soil is applied to the mud layer near the root of the plant, and the whole plant is spread after the plant is absorbed, causing the pest to die and poisoning. This method of applying in the root zone avoids being washed away by rain and is particularly suitable for use during the rainy season.
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