Rainy season rain will seriously reduce the control effect of pesticides . To this end, many farmers' friends are guilty of applying pesticides. To help farmers' friends, let us introduce some technical tips for scientific application in the rainy season.
1, the use of systemic pesticides
Systemic pesticides can enter the plant through the roots, stems, leaves, etc. of the plant and are transported to other parts. Such as tricyclazole, raining 1 hour after spraying, has no effect on the efficacy;
Omethoate emulsion, thiophanate, carbendazim, triadimefon, etc. with rapid conduction, as well as the herbicides acetochlor, quizalofop, glyphosate, etc., are absorbed by the plants to the tissues after several hours of application. Internally, the agent is less affected by rainfall.
Another example is dexamethasone, chlorfenapyr, high-efficiency flumethrin, etc. Although it has no conductive effect, it has strong penetrating power on the surface of the crop, so it is also suitable for rainy season application.
2, improve the application method
According to the performance of the drug, suitable application methods, such as systemic insecticides , can be adopted to avoid rainwater scouring and prevent pesticide loss;
According to the law of occurrence and activity of pests and diseases, appropriate pest application methods are adopted. For pests that are fed at night, such as rice leaf roller, the pesticide is applied before and after dusk, so that the medicament quickly infiltrates into the rice plant tissue, and the pests are in 2-3 hours. death.
3. Use rain-tolerant pesticides
Such as Bordeaux mixture, basic copper sulfate, copper rosinate, Jinggangmycin, chlorpyrifos, etc., 2-3 hours after application, even if it encounters moderate rain, it does not affect the application effect.
4, increase the synergist in the liquid
When using the pharmaceutical liquid, add some washing powder or saponin, etc., which can enhance the adhesion of the pesticide on the crop and the surface of the pest. Even after the application, it is not easy to wash the drug cleanly;
Adding an appropriate amount of mineral oil or vegetable oil, soy flour, starch, etc., to the powder can significantly improve the adhesion;
Water-soluble adhesives, such as various animal bone glues, gums, waste honey, etc., are added to the wettable powder or suspension. After the water is volatilized after application, the powder adheres firmly to the surface of the application object and is resistant to rain. .
5, the selection of microbial active pesticides
Microbial pesticides in continuous rainy weather but will improve efficacy. For example, fungi, bacterial pesticides, in the case of high temperature and high humidity, the breeding speed will be accelerated, and the insecticidal effect will be improved. Commonly used microbial pesticides include Bacillus thuringiensis-781, Beauveria bassiana, and Penicillium spp.
6. Use quick-acting pesticides
The quick-acting pesticide can kill the pests in a short period of time during the rainy period, thus avoiding the "chronic pesticide" reducing the efficacy due to the leaching of the pesticide by the rain;
For example, the aphids on the crops can be killed in a few minutes after the anti-èšœå¨æ–½; phoxim, omethoate, isoprocarb, phoxim and pyrethroid pesticides have a strong contact effect. Kill a large number of pests in 2 hours.
More pesticide knowledge , please pay attention to China Pesticide Network
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