Rainwater in rainy season will seriously reduce the control effect of pesticides. For this reason, many farmers are worried about applying pesticides. In order to help farmers, let's introduce some tips for scientific application in rainy season.
- drug selection
1, systemic pesticides. Can enter the plant body through the roots, stems, leaves and the like of the plant and be transmitted to other parts. For example, tricyclazole, when exposed to rain one hour after spraying, has little effect on the drug effect. Thiophanate, carbendazim, triadimefon, etc., which have rapid conduction effect, are absorbed into tissues by plants after being applied for several hours, and the medicament is less affected by rainfall.
- Rain-resistant pesticides. Such as bordeaux mixture, Basic Copper Sulphate, copper rosinate, jinggangmycin, chlorpyrifos and the like, do not affect the application effect even in moderate rain 2-3 hours after application.
- Microbial active pesticides. Microbial pesticides can improve their efficacy in continuous rainy weather. For example, fungi and bacteria pesticides, under the condition of high temperature and high humidity, the reproduction speed will be accelerated, and the insecticidal effect will be improved.
- Select quick-acting pesticides. If pirimicarb is applied, aphids on crops can be killed within minutes; Phoxim, omethoate, isoprocarb and pyrethroid pesticides have strong contact killing effect and can kill a large number of pests within 1-2 hours after application.
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