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The season is a high incidence of pests and diseases, and the application of techniques must be mastered in order to improve the control effect. In order to improve the application effect of pesticides in the rainy season, farmers should pay attention to the following five points when applying pesticides:
1. Pay attention to the weather, and apply the medicine at the right time. Generally speaking, the application effect after rain is better than raining after applying the medicine or raining while applying the 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. In addition, the application time should be selected according to the activity rules of pests. For example, some night-time pests such as rice leaf roller should be applied in the evening.
2. Select the appropriate chemical season to choose systemic, quick-acting, rain-tolerant and microbial pesticides.
A quick-acting pesticide. For example, pesticides such as chlorpyrifos, monocrotophos, chlorpyrifos, enemy killing, chlorpyrifos, deltamethrin, etc. have strong contact and fumigation effects, 1 to 2 hours after application. Or kill the pests after 4 to 5 hours.
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 dry net, powder rust, methyl thiophanate, virulence, monocrotophos, methamidophos, phosphorus amine and other bactericidal insecticides, there are 80 to 4 hours after application The active ingredient of % is absorbed into the tissues by the crops, and less of the drug is lost due to rain washing.
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. The application of such pesticides on rainy days can fully exert their pest control effects.
Washable pesticides. Among the fungicides, Jinggangmycin, Herbicide, and Suikeling have good rain resistance. Even after showering for 1 to 5 hours, they will not be washed and affect the efficacy.
3. An adhesive and an auxiliary synergist are added to the chemical solution.
Adding adhesion substances such as washing powder, tapioca water, and tea leaching solution to the pesticide can enhance the adhesion of the pesticide on crops and pests, thereby improving the control effect.
The method is: adding 50-75 grams of washing powder per 50 kilograms of the liquid, or 100-150 grams of tapioca powder, or immersing the filtrate with 250-300 grams of tea, stirring evenly and spraying in time. Note that it is best to use it now, not for a long time. Washing powder and tea leaching solution are generally not suitable for mixing with acidic pesticides.
4. Appropriate increase of chemical concentration In the rainy season, the concentration of pesticides should be increased appropriately (except for highly toxic pesticides), and the effects of disease prevention, pest control and weeding can be guaranteed. For example, the concentration of a certain pesticide is 1000-1500 times, and the rain season is 800-1000 times.
5. Improve the application method such as selecting a systemic insecticide. Before the large area of ​​the pest occurs, mix the fine soil into the soil of the root of the crop to allow the plant to absorb, causing the pest to die and poison.
Before spraying, apply a smooth long bamboo pole to gently remove the water drops from the plant and apply it.
When the medicine is being used, the traditional front-facing body is placed in front of the body. The nozzle is placed on the side of the body, so that the liquid that has just been sprayed on the side of the walkway will not be swept away by people walking.
Where conditions permit, the rainy season can be applied with ultra-low volume sprayers. The mist particles of this device are uniform and fine, and are easily stuck by plant leaves and stems without loss. The same spray effect is also obtained by replacing the 1.3 mm aperture spray on the manual sprayer boom with a 0.7 mm aperture stainless steel spray. When dispensing the pharmaceutical solution, use a fine mesh to filter the water to prevent the nozzle from becoming clogged.
1. Pay attention to the weather, and apply the medicine at the right time. Generally speaking, the application effect after rain is better than raining after applying the medicine or raining while applying the 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. In addition, the application time should be selected according to the activity rules of pests. For example, some night-time pests such as rice leaf roller should be applied in the evening.
2. Select the appropriate chemical season to choose systemic, quick-acting, rain-tolerant and microbial pesticides.
A quick-acting pesticide. For example, pesticides such as chlorpyrifos, monocrotophos, chlorpyrifos, enemy killing, chlorpyrifos, deltamethrin, etc. have strong contact and fumigation effects, 1 to 2 hours after application. Or kill the pests after 4 to 5 hours.
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 dry net, powder rust, methyl thiophanate, virulence, monocrotophos, methamidophos, phosphorus amine and other bactericidal insecticides, there are 80 to 4 hours after application The active ingredient of % is absorbed into the tissues by the crops, and less of the drug is lost due to rain washing.
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. The application of such pesticides on rainy days can fully exert their pest control effects.
Washable pesticides. Among the fungicides, Jinggangmycin, Herbicide, and Suikeling have good rain resistance. Even after showering for 1 to 5 hours, they will not be washed and affect the efficacy.
3. An adhesive and an auxiliary synergist are added to the chemical solution.
Adding adhesion substances such as washing powder, tapioca water, and tea leaching solution to the pesticide can enhance the adhesion of the pesticide on crops and pests, thereby improving the control effect.
The method is: adding 50-75 grams of washing powder per 50 kilograms of the liquid, or 100-150 grams of tapioca powder, or immersing the filtrate with 250-300 grams of tea, stirring evenly and spraying in time. Note that it is best to use it now, not for a long time. Washing powder and tea leaching solution are generally not suitable for mixing with acidic pesticides.
4. Appropriate increase of chemical concentration In the rainy season, the concentration of pesticides should be increased appropriately (except for highly toxic pesticides), and the effects of disease prevention, pest control and weeding can be guaranteed. For example, the concentration of a certain pesticide is 1000-1500 times, and the rain season is 800-1000 times.
5. Improve the application method such as selecting a systemic insecticide. Before the large area of ​​the pest occurs, mix the fine soil into the soil of the root of the crop to allow the plant to absorb, causing the pest to die and poison.
Before spraying, apply a smooth long bamboo pole to gently remove the water drops from the plant and apply it.
When the medicine is being used, the traditional front-facing body is placed in front of the body. The nozzle is placed on the side of the body, so that the liquid that has just been sprayed on the side of the walkway will not be swept away by people walking.
Where conditions permit, the rainy season can be applied with ultra-low volume sprayers. The mist particles of this device are uniform and fine, and are easily stuck by plant leaves and stems without loss. The same spray effect is also obtained by replacing the 1.3 mm aperture spray on the manual sprayer boom with a 0.7 mm aperture stainless steel spray. When dispensing the pharmaceutical solution, use a fine mesh to filter the water to prevent the nozzle from becoming clogged.
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