Spraying pesticides in summer avoids the "four major weathers". What are the four kinds of weather?

Summer is the season when many pests and diseases can be seen everywhere, and spraying pesticides is one of the essential methods for farmers to manage their fields. However, the temperature in summer is unpredictable and uncertain, and the control effect of pesticides is often endangered by the temperature. So farmers' friends must pay attention to the weather in winter. Let's take a look at four temperatures that are not suitable for spraying pesticides in summer.

The first is windy day: windy day is very easy to cause poisoning of spraying workers, so that the sprayed drug surface or inhalable particles can not be evenly attached to the surface of crops to exert their efficacy, and will also float on spraying workers, leading to poisoning.

The second is rainy days: pesticides are easy to lose in rainy days. Spraying pesticides in rainy days can wash away the drugs immediately, which not only harms the actual effect, but also continues to cause air pollution in water areas again. Drugs commonly used for seed dressing are less harmful to precipitation. Because EC can be transformed into a layer of floating oil on the surface of green plants, it has certain resistance to further precipitation cleaning, while tablets and wettable powder have the least resistance to precipitation cleaning.

The third is hot weather: pesticides are easy to cause fertilizer damage at high temperature. High temperature accelerates the melting of pesticides and the volatilization of drugs, so high temperature is not suitable for spraying drugs. Moreover, when the temperature is cold, the metabolism of crops is full, the stomata of leaves expand and open, and drugs easily enter the human body of grain crops, causing fertilizer damage.

Fourth, high and low temperature days: the drug effect is reduced in high humidity days, and the drugs in high temperature weather with heavy water mist or dew are easy to be diluted by water, which reduces the actual effect of the drugs. In addition, when the dew is not dry in the morning, the temperature is low, and the pests and diseases have not gone out to carry out the theme activities. At this time, the actual effect of spraying is not good.

In fact, the best time to spray pesticides is 8: 00- 10: 00 in the morning and 5: 00-7: 00 in the afternoon, which belongs to the time range when the sun is not obvious in the morning and evening. It can not only protect pesticides from temperature hazards, but also enable farmers' good friends to work without high temperature. Moreover, it is particularly important for farmers to pay attention to the fact that pesticides cannot be mixed with river water, because river water contains minerals such as calcium and magnesium, which easily reacts with drugs.