Vegetables in greenhouses often cause diseases and insect pests due to excessive humidity, and the commonly used spray application method increases the humidity in the greenhouse while controlling the pesticide application. Therefore, the prevention and control of vegetable pests and diseases in greenhouses should promote the use of powder spraying methods. The powder spraying method has the advantages of preventing vegetable diseases in greenhouses and has the advantages of saving labor and chemicals, not increasing humidity in the shed, and repelling effects, etc. However, attention should be paid to the following matters. First, drug selection. Select suitable dust agents, such as cucumber downy mildew, tomato late blight, use 10% antifungal agent or 5% chlorothalonil dust agent; control cucumber anthracnose, black heart disease, choose 5% chlorothalonil or 12% of KeChunLing dust agent; control cucumber bacterial keratopathies, use 10% B drops of dust agent; prevent vegetable gray mold, leaf mold, early blight and late blight, choose to benefit from dust agent. Second, medical equipment selection. Should adopt domestic harvest type 5 or 10 hand powder duster. Before the spraying, the shed was closed, and then 1 kg of powder was sprayed for each acre. The pesticide was put into a duster kit and the amount of powder discharged was adjusted to about 200 grams per minute. Third, pay attention to spraying time. Sunny days should be applied in the morning or early evening. Cloudy and rainy days can be sprayed all day. The effect of applying pesticides is best after closing the shed in the evening. In the sunny morning to the afternoon when the sunlight is strong, the dustproof effect is low. Fourth, pay attention to spraying methods. Spraying the vegetables against the vegetables, whether uniform or not, has a poor effect. Only uniform air spray effect is good. If the air spray is not uniform, part of the powder cannot be well dispersed and the control effect will be reduced. Fifth, pay attention to personal safety. Spraying personnel should pay attention to bring a mask to reduce the harm of the medicine to the human body. Sixth, after spraying, only half a month later can be picked to ensure food safety. Hanging Fire Extinguisher,Carbon Dioxide Fire Extinguisher,Fire Extinguisher Equipment,Automobile Automatic Fire Extinguisher DONGGUAN TENYU TECH.INC , https://www.tenyutech.com
Indoor greenhouse vegetables use dust to prevent pests
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