Winter continuous snow, fog, vegetable greenhouses because of its special environmental conditions, the occurrence of more serious disease, prevention spray method is time-consuming and laborious, and increase greenhouse humidity; dust and pesticide spraying method, with time-saving, labor-saving , the effect is good 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.
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. Pesticide manufacturers recommend closing the shed before applying the pesticide, and then measuring 1 kg per mu of powder, and putting the pesticide into the powder box of the duster. The amount of powder discharged is 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.
Spraying method greenhouse: using the horizontal spray method of retreat, that is, starting from the inner end of the greenhouse, the operator stands on the aisle, facing away from the north wall of the greenhouse, facing the south side, while spraying on the air, while retreating, until exiting the door, the door close. 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 powder, 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 pesticide network reminds everyone that the pesticide safety operation rules should be observed during operation. 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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