HC-22 is a hydrocarbon refrigerant blend.
The primary ingredients are hydrocarbons, which are flammable substances such
as propane and butane. HC-22 is an ozone-safe, second-generation substitute for
HCFC-22 without retrofitting. This product is currently available in 30LB
cylinders.
HC-22 is a hydrocarbon refrigerant blend. The primary ingredients are hydrocarbons,which are flammable substances such as propane and butane. HC-22 is an ozone-safe, second-generation Substitute for HCFC-22 without retrofitting. This product is currently available in cylinders.
R22 Replacement Gas,Hydrocarbon Gas 22,Hc-22A Hydrocarbon Refrigerant,Substitute for HCFC-22 ZHEJIANG ZHONGLAN REFRIGERATION TECHNOLOGY CO.,LTD , http://www.uiszl.com
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 choose the appropriate duster It is better to use the domestic harvest 5 or 10 hand powder sprayer. 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 spraying time On sunny days, it is advisable to apply medicine in the morning or evening, and spray it all day on cloudy and rainy days. 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 Spraying 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.
Excerpted from: Henan Science and Technology News
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:
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