According to the temperature change to determine: whether it is plants or insects or germs, 20 ~ 30 ° C, especially 25 ° C, is the most suitable activity temperature. At this time, it is more effective to fight the pests and diseases in the active period and to make the crops safer. In the summer hot season, the time of fight should be before 10 am and after 4 pm. Spring and autumn cool season, should be selected before 10 o'clock in the morning before 2 o'clock in the afternoon. In the greenhouse in winter and spring, it is best to choose to fight in the morning in sunny weather.
When the humidity of the air is too high, the deposited liquid will become a larger droplet, and after being affected by gravity twice, it will deposit on the lower part of the plant, thereby causing phytotoxicity. When the humidity of the air is too small, the liquid easily evaporates, resulting in less exposure to the target, thereby reducing the efficacy, and severe burning lesions. Therefore, the fight drug environment should be kept ventilated.
It is reasonable to mix pesticides: in the early stage of the disease, a therapeutic fungicide is absorbed by a protective fungicide. In the case of insecticide, it is optional to use an insecticide which has an ovicidal action and an insecticidal action. Note: The same ingredient should avoid mixing, and the copper preparation should avoid mixing with alkaline pesticides to prevent phytotoxicity.
Adjust the size of the drop: According to the performance of the sprayer and its nozzle, adjust the appropriate droplet size. In the greenhouse vegetables to control diseases and aphids, whitefly and other tiny pests, you can choose a fog machine; when the open field vegetables to control pests and diseases, you must choose to spray a larger sprayer.
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