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When working with a knapsack sprayer, it is necessary to first press the rocker several times so that the air pressure in the air chamber reaches the working pressure and then turn on the switch to blow while spraying. If the pressure rocker feels heavy, you can't use excessive force to avoid explosion in the air chamber.
When the liquid medicine in the liquid medicine barrel exceeds the safe water level during operation, the pressure rocker should be immediately stopped to prevent the air chamber from bursting.
When working with a compressed sprayer, the dosing liquid must not exceed the prescribed water level to ensure that there is enough space to store the compressed air so that the spray pressure is stable and uniform.
Without a safety valve, the compressed sprayer must be pumped up (usually 30 to 40 times) according to the instructions on the product's instruction manual. It is forbidden to extend the lever and encourage the two to work together so as to avoid overpressure burst of the liquid barrel. During the use of the compression sprayer, the pressure in the medicine box will continuously decrease. When the atomization quality of the spray head drops, the spray must be suspended and the air pressure must be recharged to ensure good atomization quality. Diseases, pests and weeds are different from pesticides, and their application methods are also different.
Soil treatment spraying herbicides requires less small droplets that are liable to be lost and avoid the crop damage caused by the herbicide droplets drifting. The pesticide is distributed evenly in the field to ensure the prevention and control effect, and avoid the herbicide harm caused by the excessive amount of drugs in local areas. Therefore, the herbicide spraying should adopt the fan-shaped fog nozzle, and the nozzle height, the walking speed and the route should be consistent when operating; the small spray bar spray with two nozzles and three nozzles can also be used.
When using a manual sprayer spray to prevent crop pests and diseases, it is best to use a small spray, cut nails can not be used artificially large head. This is because the droplets of pesticides produced by the small nozzles are finer than the droplets of the coarse jets, and the control effect is good.
Spraying the protective bactericide with a sprayer should be performed before the plant is infected by pathogens or at the initial stage of infection. It is required that the droplets be deposited uniformly on the plant target and have a certain droplet coverage density.
When using an automatic sprayer to spray herbicides between rows, it is necessary to configure sprinkler guards to prevent the mists from drifting and causing damage to adjacent crops. When spraying, the height of the sprinklers should be consistent, and the distribution of the chemical deposits should be uniform. No re-ejection or missed spray is allowed.
When several medical devices are sprayed at the same time, trapezoidal advancement should be used, and people on the downwind side should be sprayed first to avoid contact with the liquid.
When spraying, the field must maintain a 3 to 5 cm deep layer of water, turn off the water for 5 to 7 days, let it dry naturally.
After each use of the sprayer, the remaining liquid in the barrel should be poured out. Add a small amount of clean water to continue spraying. Clean all parts with clean water, and then open the switch and store in a ventilated and dry place. The residue of sprayed pesticides or the sewage from the cleaning of medical equipment should be properly handled in a safe place and shall not be splashed anywhere so as to avoid environmental pollution. (Professor of Hunan Agricultural University, Deputy Director of Plant Protection and Phytosanitary Station)
Scientific use sprayer
Before the operation, formulate pesticides according to the operating procedures. Before filling the liquid barrel with liquid medicine, be sure to turn off the switch so as to avoid the leakage of the liquid, and filter the liquid with a filter. Do not exceed the level of the waterline shown on the barrel wall. After filling the liquid, the lid must be tightly closed to avoid liquid leakage during operation.