Garden Maintenance--Problems to Pay Attention to When Applying Pesticides in the Rainy Season
The following issues need to be noted when spraying pesticides during the rainy season: One is to watch the sky and apply the medicine at the right time. In general, the application effect after rain is better than raining after application or raining while applying medicine. Therefore, we must pay attention to the situation of the sky, try to choose the best time to spray, in order to improve the control effect. In addition, the application time should be selected according to the flow law of the pests. For example, some night-time pests such as rice leaf roller should be applied in the evening. The second is to choose the right agent. The rainy season is good for systemic, quick-acting, rain-tolerant and microbial pesticides . A quick-acting pesticide. For example, dichlorvos in insecticides, fast-killing chlorpyrifos, monocrotophos, killing pine, killing enemy, killing spirit, quick-killing and other pesticides, have strong contact and fumigation effects, after application 1-2 The pests can be killed in hours or 4-5 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 cumin, triadimefon, thiophanate, acesulfame, monocrotophos, carbofuran, methamidophos, dimethoate, omethoate, phosphorus amine and other bactericidal insecticides , after application In 4-5 hours, 80% of the active ingredients are absorbed by the crop inside the tissue, and less due to rainwater leaching and loss of medicinal properties. Resistant to washing pesticides. Among the fungicides, Jinggangmycin, Herbicide and Suikeling have good rain resistance. Even after showering for 1-5 hours, they will not be washed and affect the efficacy. 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 the condition of high humidity, and the pesticide can be fully applied in rainy days. The third is to add an adhesive and an auxiliary synergist to the liquid. Adding adhesion substances such as washing powder, tapioca water, and tea leaching solution to the pesticide can enhance the adhesion of the pesticide on the crop and the pest, thereby improving the control effect. The method is as follows: 50-75 grams of washing powder, or 100-150 grams of tapioca powder, or 250-300 grams of tea leaching filtrate per 50 kilograms of the drug solution, and the mixture is stirred and sprayed in time. Pay attention to the best available now, not for a long time. In addition, the addition of 0.1% of the synergistic agent such as chlorhexidine (sold by the company) can significantly increase the control effect. The washing powder and tea leaching solution should not be mixed with acidic pesticides. The fourth is to increase the concentration of the drug solution appropriately. In the rainy season, the concentration of pesticides should be appropriately increased (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 800-1000 times, and the rain season is 1000-1500 times. The fifth is to improve the method of application. If a systemic insecticide is selected, the soil will be applied to the root soil of the crop before the large area of ​​the pest occurs, so that the plant can be absorbed, 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 there is a premise, the rainy season can be applied with an ultra-low volume sprayer. The mist particles of this device are average and fine, and are easily stuck by the leaves and stems of the plant without being lost. The same spray effect is also obtained by replacing the 1.3 mm aperture spray on the manual sprayer boom with the 0.7 mm aperture stainless steel spray. When dispensing the pharmaceutical solution, pay attention to the fine mesh to filter the water to prevent the nozzle from clogging. Lamp Bulb,Led Bulb,Led Lighting PVC Compound,Filter Biomedia Co., Ltd. , http://www.chpvcprofile.com