At this time, fighting drugs will be more effective for the active pests and weeds and will be more safe for crops. Specifically, during the summer heat season, the time for fighting drugs should be before 10 o'clock in the morning and after 4 o'clock in the afternoon; the spring and autumn cool season should be selected before 10 o'clock in the morning before 2 o'clock in the afternoon; the greenhouse in winter and spring is best to choose sunny weather in the morning Fight drugs.
Time selection follows two principles
The liquid from the deposition to the deployment will be affected by many factors, including the air humidity. If the air humidity is small, the moisture in the medicine droplets will quickly evaporate into the air, which will reduce the efficacy, and even cause burning burns; Conversely, if the air humidity is too high, the liquids deposited on the plant surface, especially large droplets, can easily condense into larger droplets, and the secondary deposition of plants under the influence of gravity can also cause phytotoxicity. Therefore, the time of day to fight drugs needs to follow two principles, one is that the air humidity is slightly dry, and the other is that the drug liquid can form a dried film on the surface of the target before sunset.
The closer the distance is, the better the efficacy is.
Within a certain distance, the farther away from the nozzle, the smaller the droplets. Small droplets are more likely to deposit and spread on the target, so it is not better if the nozzle is close to the plant. Generally, the sprayer of the backpack type electric atomizer should be kept at a distance of 30 to 50 cm from the target, and the motorized sprayer should be kept at a distance of about 1 meter. According to the performance of the sprayer and the sprayer, the spray nozzle can let the spray fog fall on the target. The efficacy will be better.
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