The powder spraying method is used for pesticide control of vegetable diseases, which does not increase the humidity in the shed. Because the dust floats for a long time, the granules can be deposited in various parts of the plant, and can also spread to the hidden parts of the plants, even if the protective ground is not tightly sealed, it will not affect. Control effect. Moreover, this method is convenient to operate, saves labor, saves time, and saves medicine. If you are facing the vegetables during dusting, the effect will be poor regardless of whether the spray is even or not. Only when the powder is evenly sprayed, the effect is good. If the powder is not evenly distributed, some of the powders will not disperse well and the control effect will be reduced.
In the greenhouse, the retreat level dusting method should be adopted, that is, from the inner end of the greenhouse, the operator stands on the aisle, back to the greenhouse door, while spraying the air, while retreating, until the door is exited, 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 the powder until the remaining powder is sprayed.
In the greenhouse, the left and right swinging spray method should be adopted. From the north end, the operator stands on the aisle and swings the powder spray pipe to spray powder on the left and right sides. While spraying, it retreats until it exits the door and closes the door.
In the small and medium-sized arch shed, the shed-out powder spraying method should be adopted, that is, the shed should be uncovered in a part of the outside of the shed or on both sides, and the powder-spraying pipe is inserted into the shed for dusting. The China Pesticide Network reminds everyone to pay attention to the nozzle swinging left and right. Before the dusting, close the vents and doors of the shed, and cover the plastic cloth of the shed to ensure the closed state.
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