Application of dusting agent in protected vegetables
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1. Type of dust. 5% chlorothalonil dust, 7% leaf mold, 10% enemy dust, 7% anti-mold dust, 5% profit dust, 5% anti-bacterial dust, 5% Garon dust, 6.5% methicillin dust, 8% gram of charcoal dust, anti-mite dust and so on.
2. Control objects. Downy mildew, gray mold, keratosis, anthracnose, bacterial spot disease, bacterial angular leaf spot, sclerotinia, spot blotch, black spot, leaf mold, aphid, etc.
3. Instructions. In the prevention and control, special dusters should be used, such as the Harvest 5 type chest lifting hand powder sprayer and the Harvest 10 type knapsack hand powder sprayer, and the Dongfanghong-18 type mist and dusting machine. When used, the speed of the handle of the duster is respectively, the harvest type 5 is not less than 30 revolutions per minute; the harvest type 10 is not less than 50 revolutions per minute. The dust spray is about 200 grams per minute, and the wind speed at 10 cm outside the nozzle is not less than 10 meters per second.
1 kg of dust spray per acre. However, the new duster that has not been used, when installing the dusting agent for the first time, should be installed more as a bottom (about 1500 grams), and the amount of dust afterwards is about 1000g per acre.
The time of spraying dust is selected in the morning or evening. When the vegetables have dew on the vegetables, the powder is easy to adhere to the vegetables and can get better control effect, but pay attention to the powder holes not to be wet with the dew, so as to avoid the powder formation. group. If it is sprayed in the morning, it can be opened for 1-2 hours after the spraying, and the room will be used for farming activities. If it is sprayed in the evening, it can be opened again in the next morning. The disease is sprayed once every 7 days, usually 4-5 times; the pests are sprayed once every 10 days, usually 2-3 times.
When spraying dust, the nozzle is up, sprayed on the space above the vegetable, so that the dust naturally falls on the vegetable plant. It is not suitable to spray directly on the vegetable plant, otherwise the spraying will be uneven, affecting the control effect, and the amount of dust spray is increased, and the investment is increased. Big.
4, matters needing attention. 1 Dust should be kept dry and stored in a dry place, protected from rain, moisture and sun.
2 The sprayer's medicine box needs to be kept dry and free of water or moisture. When spraying dust, no water is added. It is not suitable to spray within 3 days after spraying dust, so as not to affect the effect.
3 If you need to spray liquid when controlling, you can spray the liquid first, then spray the dust.
4 When spraying dust, the operator should stand on the wind and avoid blowing in the wind to prevent the poison powder from being sprayed onto himself. A mask, goggles and gloves must be worn to prevent the dust from blowing into the heel and the nostrils or mouth. Suck into the body. After spraying, rinse your hands, face, etc. with soapy water or water.
5 When spraying dust, first close the tuyere, spray it from the inside out, and close the door after spraying. Each acre is usually sprayed in about 4 minutes.