How to apply pesticides in the rainy season? Farmers should pay attention to the following five points!

The rainy season is a period of high incidence of diseases and insect pests, pesticide control must master the technology in order to improve the control effect. Rain Water will seriously reduce the control effect of pesticides in the rainy season. In order to improve the application effect of pesticides in the rainy season, how to apply pesticides in the rainy season? Farmers should pay attention to the following five points!

Pay attention to the weather and apply medicine skillfully at the right time

Generally speaking, the effect of pesticide application after rain is better than that after application or the rain while applying medicine. Therefore, we should pay attention to the weather conditions and choose a good weather period as far as possible to improve the control effect. In addition, the application time should be skillfully selected according to the activity law of pests, such as some nocturnal pests such as rice leaf roller should be applied in the evening.

Second, choose the appropriate medicament

The effect of internal absorption, quick effect, rain resistance and microbial pesticide is good in rainy season.

1. Quick-acting pesticide

For example, the pesticides in the insecticides, such as chlorhexidine, monocrotophos, fenitrothion, dimethrin, deltamethrin and so on, have strong contact and fumigation effects, and the pests can be killed in 1-2 hours or 4-5 hours after application.

two。 Internal absorption pesticide

Internal absorption pesticides can be introduced into the plant through the roots, stems, leaves and other parts of the crop, and transported to other parts, and play a role in a short time. Such as carbendazim, triadimefon, Yekujing, triadimefon, thiophanate methyl, aldicarb, monocrotophos, methamidophos, phosphoramines and other bactericidal insecticides, 80% of the active ingredients were absorbed into the tissue 4-5 hours after application, and less was lost due to Rain Water leaching.

3. Microbial active pesticide

Commonly used microbial pesticides such as BT-781, cyanobacteria and Beauveria bassiana are more favorable for sporophyte germination and reproduction under high humidity conditions, and their insecticidal effects can be brought into full play when applied in overcast and rainy days.

4. Washable pesticide

Among the fungicides, Jinggangmycin, methomyl and Sukeling have good rain resistance. even if they encounter showers after 1-5 hours of application, they will not be washed and the efficacy will not be affected.

Third, add adhesives and auxiliary synergists to the solution

Adding adhesive substances such as washing powder, cassava pulp and tea extract to pesticides can enhance the adhesion of pesticides to crops and pests, thus improving the control effect.

Application method: add 50 grams of laundry powder, 100 grams of cassava powder, or 250 grams of tea extract filtrate in every 50 kg solution, stir evenly and spray in time. Note that it is best to match it now, not for a long time. Washing powder and tea extract are generally not suitable to be mixed with acid pesticides.

Fourth, appropriately increase the concentration of the solution.

Pesticide application in rainy season should appropriately increase the concentration of pesticides (except highly toxic pesticides), so that the effect of disease prevention, insect control and weeding can be guaranteed. If the common concentration of a pesticide is 1000-1500 times, 800-1000 times can be used in the rainy season.

Fifth, improve the method of pesticide application

For example, select internal inhalation insecticides, before the occurrence of pests in a large area, mix fine soil into the root soil of crops, let the plants absorb, causing pests to eat and die of poisoning.

Before spraying, gently roll out the water droplets on the plant with a smooth long bamboo pole, and then apply the medicine. When taking medicine, change the traditional word in front of the body to put the sprinkler on the side of the body, so that the liquid just sprayed on the plant along the aisle will not be swept away by the movement of the person.

Where there are conditions, the ultra-low capacity sprayer can be used in the rainy season. The fog particles of this instrument are uniform and fine, and are easy to be stuck by plant leaves and stems without loss. Replacing the 1.3 mm aperture spray sheet on the spray rod of the manual sprayer with 0.7 mm aperture stainless steel spray sheet also has the same preventive effect. When preparing the liquid, we should filter the water with a fine net to prevent the spray hole from being blocked.

The above is the introduction of how to apply pesticides in the rainy season, farmers can learn from this article as a reference!