Application of powder dust in greenhouse

1, Duster adjustment. The hand-powdered duster is used for harvesting -5 and harvesting -10. The harvest speed of the Harvest-5 hand crank should be no less than 36 revolutions per minute, and the harvest-10 must reach 50 revolutions per minute. Make the dusting mouth can produce strong enough wind to make the powder evenly discharged. The amount of powder discharged was adjusted to 200 grams per minute, 1 kilogram of dust agent 1 kilogram. Put the dust agent into the duster's medicine box. Note that there should be no water or moisture in the medicine box.

2. Preparation of the booth before dusting. Before the dusting, the ventilation openings of the booths and the doors at the other end shall be closed, and the plastic sheeting of the booths shall be tightly closed so as to achieve the hermetically sealed state of the booths. If there is a small piece of the tented cloth, it will not affect the dust.

3. The greenhouse uses a horizontal horizontal spraying method. From the far end of the greenhouse, operators stood on the aisle in front of the North Wall, facing away from the northern wall of the greenhouse, facing south, and using a reverse-to-air spray method. According to the height of the crop, the nozzle can be appropriately swung up and down, sprayed and retreated to the other end until it exits the door and closes the door. Check the medicine box. If there is any medicine, spray the powder tube into the room from the ventilation window and spray until the powder is completely sprayed.

4. In the greenhouse, the air-to-air swing spray method is used. From the northern end, the operator stood on the aisle and swept the dusting tube to spray powder to the right and left. You can swing the nozzle up and down according to the height of the crop, spray it, and retreat along the middle aisle until you exit the door at the south end and close the door. , Check the medicine box, if there is more than powder from the outside of the shed on both sides of the vents into the shed to spray the spray tube until the powder is sprayed.

5. Small and medium bow sheds are sprayed on the outside of the shed. Because the bow shed is short and the operator cannot enter, the powder can be sprayed from one side or both sides of the shed, that is, the shed cloth is partially removed from the outside, and the dusting pipe is projected into the shed for spraying, and the nozzle sways. According to the size of the shed and the amount of drug used, the awning cloth can be sprayed in different parts of the bow shed until spraying.

6, the right time to spray powder. The election is conducted in the evening or in the morning so that the deposition rate of the powder in the crop is higher and dust can be sprayed at any time during the rainy days. Open the vents about 2 hours after dusting. If you spray in the evening, you can wait until the next morning to open the ventilation. The first time the spray was applied, it was sprayed every 7 days to 10 days according to the condition.

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