Aerosol can control various diseases of greenhouse vegetables. The effect can reach more than 85%, more than 10% more than the spray prevention effect, and it is easy to use, especially in cloudy days or disease epidemics, the use of aerosol control effect is better . The techniques for using aerosols in shed vegetables are described below:
Selecting aerosols should be based on the choice of suitable aerosols for different diseases. For example, chlorothalonil aerosols may be used to prevent disease before colonization. When the tomato and cucumber in the greenhouse are infected with leaf mold, quick-drying aerosol can be used for prevention and treatment. When multiple diseases occur together, compound aerosols such as chlorothalonil and quick-mixing aerosols can be used for prevention and treatment.
To determine the location of the large-scale greenhouse for the discharge point, use aerosols with a high content of active ingredients (30%, 20%, and 10%), generally 3-5 can be set per acre; for smaller sheds, It is advisable to use aerosols with a low content of active ingredients (10%, 15%), generally 7-10 per mu; for small sheds less than 1.2 meters above the shed height, it is not advisable to use aerosols, otherwise it is easy to produce phytotoxicity.
When the dosage is generally 30% chlorothalonil aerosol or 10% quick-drying aerosol or 22% dichlorvos aerosol, the dosage is 0.3-0.4 g/m3 for each use. The dosage is 300-400 grams.
The number of medications depends on the severity of the disease and the number of medications is determined. In the early stage of disease, it is usually only necessary to discharge aerosols once to achieve control effects. If not, spray aerosols 2-3 times in a row every 5-7 days.
Before using aerosols, the method of discharge should be closed tightly. The discharge time is generally better in the evening. The aerosols are placed evenly and ignited in order from the inside out. After the personnel left the site, the booth was closed overnight. After the greenhouse was ventilated the next morning, personnel could enter the shed.
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