In the winter, even in the snowy and foggy weather, the greenhouse vegetables are more serious due to their special environmental conditions. The spraying method is time-consuming and labor-intensive, and increases the humidity of the greenhouse. The dust method is time-saving and labor-saving. Good results and so on.
The dust floats for a long time, and the drug particles can be deposited in various parts of the plant, and can also spread to the hidden parts of the plant. Even if the protective ground is not tightly sealed, it will not affect the control effect. At the same time, the operation is convenient, labor saving, time saving and medicine saving. No need to add water to spray, no water source restriction, short spraying time, long interval between medications, less medication, and higher utilization rate of pesticides.
Spray preparation
Choose a suitable dusting agent: 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 Cokeling dust; control of cucumber bacterial angular leaf spot, use 10% of B drop dust; control vegetable gray mold, leaf mold, early blight and late blight, use 12% of the benefit powder.
Choose the right 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.
Preparation of the shed before spraying: Before the dusting, close the vents and doors of the shed, cover the plastic cloth of the shed, and try to reach the sealed state. If the shed cloth has small pieces, it will have no effect on the dust.
Spraying time: The best time for dusting is morning or evening. The cockroach has not been uncovered or just closed, so the deposition rate of the powder on the crop is higher. Noon should be avoided at noon on sunny days, and powder can be sprayed at any time on cloudy days. Ventilation can be turned on after about 2 hours of dusting. In the first stage of the onset of the first spray, it is sprayed once every 7 to 10 days depending on the condition.
Spray method
Greenhouse: Using the horizontal spray method of retreat, that is, from the inner end of the greenhouse, the operator stands on the aisle, faces the north wall of the greenhouse, faces the south side, sprays on the air, and retreats until the door is closed and the door is closed. If there is any remaining medicine, the powder spray pipe can be inserted into the room from the upper air outlet to spray, until the remaining powder is sprayed.
Greenhouse: The left and right air swinging method is adopted. From the north end, the operator stands on the aisle and swings the powder pipe to spray powder on the left and right sides. While spraying, it retreats until it exits the door of the south end and closes the door.
Medium and small arch shed: The shed is sprayed, that is, the shed is uncovered on the side of the shed or on different sides of the shed, and the powder spray pipe is inserted into the shed for spraying, and the nozzle swings left and right.
Precautions
When spraying, the powder must be sprayed evenly into the space of the booth. It is not advisable to spray the powder spray tube to the plant line by line, otherwise the deposition will be uneven.
The operation should be in accordance with the pesticide safety operation rules. It is required to wear long-sleeved overalls, goggles, masks and protective caps. The hands and other exposed skin must be cleaned after work.
The dust floats for a long time, and the drug particles can be deposited in various parts of the plant, and can also spread to the hidden parts of the plant. Even if the protective ground is not tightly sealed, it will not affect the control effect. At the same time, the operation is convenient, labor saving, time saving and medicine saving. No need to add water to spray, no water source restriction, short spraying time, long interval between medications, less medication, and higher utilization rate of pesticides.
Spray preparation
Choose a suitable dusting agent: 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 Cokeling dust; control of cucumber bacterial angular leaf spot, use 10% of B drop dust; control vegetable gray mold, leaf mold, early blight and late blight, use 12% of the benefit powder.
Choose the right 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.
Preparation of the shed before spraying: Before the dusting, close the vents and doors of the shed, cover the plastic cloth of the shed, and try to reach the sealed state. If the shed cloth has small pieces, it will have no effect on the dust.
Spraying time: The best time for dusting is morning or evening. The cockroach has not been uncovered or just closed, so the deposition rate of the powder on the crop is higher. Noon should be avoided at noon on sunny days, and powder can be sprayed at any time on cloudy days. Ventilation can be turned on after about 2 hours of dusting. In the first stage of the onset of the first spray, it is sprayed once every 7 to 10 days depending on the condition.
Spray method
Greenhouse: Using the horizontal spray method of retreat, that is, from the inner end of the greenhouse, the operator stands on the aisle, faces the north wall of the greenhouse, faces the south side, sprays on the air, and retreats until the door is closed and the door is closed. If there is any remaining medicine, the powder spray pipe can be inserted into the room from the upper air outlet to spray, until the remaining powder is sprayed.
Greenhouse: The left and right air swinging method is adopted. From the north end, the operator stands on the aisle and swings the powder pipe to spray powder on the left and right sides. While spraying, it retreats until it exits the door of the south end and closes the door.
Medium and small arch shed: The shed is sprayed, that is, the shed is uncovered on the side of the shed or on different sides of the shed, and the powder spray pipe is inserted into the shed for spraying, and the nozzle swings left and right.
Precautions
When spraying, the powder must be sprayed evenly into the space of the booth. It is not advisable to spray the powder spray tube to the plant line by line, otherwise the deposition will be uneven.
The operation should be in accordance with the pesticide safety operation rules. It is required to wear long-sleeved overalls, goggles, masks and protective caps. The hands and other exposed skin must be cleaned after work.
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