1. The duster is sprayed with a domestic harvesting type 5 or 10 hand-cranked duster, and the shed is closed before spraying, and then the powder is sprayed into the duster according to the amount of 1 kg per mu. In the medicine cabinet, the amount of powder discharged is adjusted to 150 to 250 grams per minute, the rotation speed of the type 5 duster is 30 revolutions per minute, and the rotation speed of the type 10 duster is about 50 revolutions per minute; the dispensing personnel should wear a mask. Or goggles, the dust should be kept dry.
2, the choice of dust pesticides commonly used in dust pesticides are mainly 5% chlorothalonil, 5% gram dew, 10% gram, 10% leaf mold, 10% fungicide, 7% anti-mold, 10% more than 100 Powder, 10% enemy, 5% cockroach powder, etc. In order to increase the control effect, the dusting agent can be thoroughly mixed with a small amount of wettable powder and then sprayed, such as controlling cucumber downy mildew with 5% gram dew ultra-fine dust 750g plus new Wansheng 50g or fast net 10 Gram; control cucumber blight with 5% chlorothalonil dust 750 grams plus 50 grams of anti-virus cockroaches.
3, master the best time Sunny is best in the evening or morning; cloudy days at near noon. The specific spraying should be started before the onset or at the beginning of the disease, and then sprayed once every 7 days or so. If you spray in the morning or at noon, open the shed door or room window after 2 hours; if you spray in the evening, open the protective vents the next morning to fully exert the effect.
4. Spraying method 1 Spray powder in the greenhouse. Starting from the north end, the operator stands on the middle aisle, swings the powder spray pipe to spray powder to the left and right sides, and swings the nozzle up and down according to the height of the plant, while spraying back and forth until it retreats. Outside the south end, close the door. If there is any remaining powder, the shed cloth can be slightly uncovered from both sides of the outside of the greenhouse, and the powder spray pipe is inserted into the spray until it is finished. 2 Spraying powder in the greenhouse, starting from one end of the greenhouse, the operator stands on the aisle, sprays powder toward the south, and sprays back and forth until the door is closed and the door is closed. 3 spray powder in the small and medium shed; the small and medium shed is small in size, the shed body is low, and it is inconvenient to operate. The shed film can be uncovered from a different part of one side, and the powder is sprayed into the powder spray tube. The spray hole is sealed immediately after spraying. strict.
Author: Li Qiang Hua County Agricultural Technology Promotion Center
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