Four principles of spraying pesticides during the rainy season
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See the weather and apply the medicine
In general, the effect of applying after rain is better than raining after application or raining while applying medicine. Therefore, it is necessary to pay attention to the weather conditions, and select the weather time spraying as much as possible to improve the control effect.
Choose the right pharmacy
In the rainy season, it is better to use systemic, quick-acting, rain-tolerant and microbial pesticides.
1. Systemic pesticides. Systemic pesticides can enter the plant through the roots, stems, leaves and other parts of the crop, and transport to other parts, which will work in a short period of time. Such as carbendazim, triadimefon, leaf cumin, triadimefon, thiophanate, acesulfame, monocrotophos, carbofuran, methamidophos, dimethoate, omethoate, phosphorus amine and other bactericidal insecticides, after application In 4 to 5 hours, 80% of the active ingredients are absorbed into the tissues by the crops, and less of the drug is lost due to rain washing.
2, quick-acting pesticides. Such as insecticides, dichlorvos, chlorpyrifos, monocrotophos, chlorpyrifos, enemy killing, chlorpyrifos, chlorpyrifos, anti-carbocarb, pyrethroids and other pesticides, with strong contact and toxicity Killing effect, the pest can be killed after 1~2 hours or 4~5 hours after application. Less affected by the rainy season.
3, washable pesticides. Among the fungicides, Jinggangmycin, Herbicide, Tricyclazole, and Scopolamine have good rain resistance. Even after showering for 1 to 5 hours, they will not be washed and affect the efficacy.
4. Microbial active pesticides. The commonly used microbial pesticides such as BT-781, Penicillium, Beauveria bassiana are more favorable for the germination and reproduction of sporophytes under high-humidity conditions, and the pesticides can be fully exerted in rainy days.
Adding an adhesive to the liquid
Appropriate amount of adhesive such as detergent in the liquid can enhance the adhesion of pesticides on crops and pests, thereby improving the control effect.
The method is: adding 50~75 grams of washing powder to each 50 kg of the liquid medicine, and evenly stirring and spraying in time. Note that it is best to use it now, not for a long time.
Spray pesticides along the wind
It should be sprayed in the direction of the wind to prevent the pesticide from falling in the direction of the wind from falling on the ground, or causing poisoning to the pesticide.
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