What methods do you know to improve the efficacy in rainy season?

In agricultural production, it is often rainy season, which brings inconvenience to disease prevention and insect control. It is often said by some farmers that the effect of pesticide application in rainy season is poor. The rainy season is the high incidence period of pests and diseases, and only by mastering the application technology can the control effect be improved. In order to improve the application effect of pesticides in rainy season.

Pay attention to the weather and choose the right time to apply the medicine.

Generally speaking, the effect of applying pesticide after rain is better than that after or when applying pesticide. Therefore, it is necessary to observe the weather and try to choose sunny time to spray in order to improve the control effect. In addition, the application time should be selected according to the activity law of pests. For example, some nocturnal pests, such as rice leaf roller, should be applied at dusk.

Choose a reasonable drug.

It is very effective to use internal-absorption, quick-acting, rain-resistant and microbial pesticides in rainy season.

Quick-acting pesticides: such as chlorhexidine, monocrotophos, cartap, triamcinolone acetonide, deltamethrin and other pesticides. It has strong contact and fumigation effects, and can kill pests 1 ~ 2 hours or 4 ~ 5 hours after application.

Internal system pesticides: internal system pesticides can enter plants according to the position of roots, stems and leaves of crops, and spread to other positions, taking effect in a short time. Such as triadimefon, triadimefon, Yekujing, triadimefon, thiophanate-methyl, mirex, monocrotophos, methamidophos, phosphoramidite, etc. 80% of the ingredients are released into tissues by plants within 4-5 hours after use, and less medicinal properties are lost due to rainwater infiltration.

Microbial pesticides: common biological pesticides such as Bt-78 1, Penicillium, Beauveria bassiana, etc. It is more conducive to the germination and reproduction of its sporophyte under high and low temperature standards, and it can give full play to its insecticidal effect when used in rainy days.

Cleaning-resistant pesticides: among pesticide fungicides, Jinggangmycin, Mifepristone, Sukeling, etc. It has good rain resistance, and even if it encounters showers after 1 ~ 5 hours of application, it will not get wet and affect the efficacy.

Adding adhesive and auxiliary synergist into the liquid medicine.

Adding elements with adhesion to pesticides, such as soap powder, cassava powder and tea cake soil solution, can improve the adhesion of pesticides to crops and pests, and then improve the control effect.

The method is as follows: 50-75g of soap powder,100-150g of cassava starch or 250-300g of tea cake lixivium are added into every 50kg of liquid medicine, and sprayed immediately after being evenly stirred. Attention, it's better to use it now, not for long. Soap powder and tea cake soil solution are generally not suitable for mixing with acid-base pesticides.

In rainy season, the concentration of pesticides (except toxic pesticides) should be increased as much as possible to ensure the functions of disease prevention, insect prevention and weeding. For example, the common concentration of a certain pesticide is 1000 ~ 1500 times, and it can be used 800 ~ 1000 times in rainy season.