The use of powder spraying method to control greenhouse vegetable diseases has the advantages of saving labor and medicine, not increasing the humidity inside the shed, and the control effect is remarkable. Pay attention to the following four points when doing specific operations:
First, pay attention to the selection of suitable dust to control cucumber downy mildew, tomato late blight, use 10% anti-mildew or 5% chlorothalonil dust; control cucumber anthracnose, black heart disease, choose 5% chlorothalonil Or 12% of the charcoal dust; control bacterial keratosis of cucumber, use 10% of the B drop dust; control vegetable gray mold, leaf mold, early blight and late blight, use 12% 0 benefit Dust.
Second, pay attention to the selection of a suitable duster should use the domestic harvest 5 or 10 hand-cranked duster. Before the application, the shed was closed, and then the powder was sprayed at 1 kg per acre. The pesticide was placed in the sprayer medicine box, and the amount of powder discharged was adjusted to about 200 grams per minute.
Third, pay attention to the spraying time on sunny days should be applied in the morning or evening, cloudy and rainy days can spray. Applying the best after closing the shed in the evening. In the sunny morning to afternoon, the sunlight is strong and the dust control effect is low.
Fourth, pay attention to the spraying method to spray the vegetables, whether uniform or not, the effect is very poor. Only a uniform air-to-air powdering effect is good. If the powder is not evenly distributed, some of the powders will not disperse well and the control effect will be reduced.
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