What effect does the weather have on spraying pesticides?
2023-08-02 22:09:02
The control effect of pesticides is often affected by the weather. The use of pesticides under the following four climatic conditions will affect the efficacy:
One: windy weather is easy to poison: when the wind is strong, it is not suitable to use the medicine. The wind is easy to make the sprayed powder or mist dripping with the wind, can not be evenly attached to the surface of the crop, and will float on the pesticide to easily poison the person.
2. Loss of pesticides in rainy weather: Spraying rainwater on rainy days can directly wash away the effects of unfairness of the chemicals, which will also cause pollution in the waters. Generally, the pesticides used for seed dressing are less affected by rainwater. The emulsifiable pesticides can form an oil film on the surface of the crops. Further rain erosion has a certain resistance, while powders and wettable powders are the least resistant to rain.
Third, high temperature weather drug decomposition: high temperature will accelerate the decomposition of pesticides, chemicals volatilization, so high temperature is not suitable for drugs, because crops in the hot weather, metabolism is strong, leaves stomata open, the drug is easy to enter the crop body and phytotoxicity.
Fourth, the high temperature weather is low in efficacy, the high temperature weather with heavy fog or dew is easy to be diluted by water and the effect of cheaper agent is reduced. In addition, when the morning dew is not dry, the temperature is relatively low, and the pest has not come out yet. not good. The best time to fight drugs: 8:00~10:00 in the morning and 5:00~7:00 in the afternoon. Avoid using well water to control the medicine. Because the well water contains calcium, magnesium and other minerals, it is easy to react with the chemical.
One: windy weather is easy to poison: when the wind is strong, it is not suitable to use the medicine. The wind is easy to make the sprayed powder or mist dripping with the wind, can not be evenly attached to the surface of the crop, and will float on the pesticide to easily poison the person.
2. Loss of pesticides in rainy weather: Spraying rainwater on rainy days can directly wash away the effects of unfairness of the chemicals, which will also cause pollution in the waters. Generally, the pesticides used for seed dressing are less affected by rainwater. The emulsifiable pesticides can form an oil film on the surface of the crops. Further rain erosion has a certain resistance, while powders and wettable powders are the least resistant to rain.
Third, high temperature weather drug decomposition: high temperature will accelerate the decomposition of pesticides, chemicals volatilization, so high temperature is not suitable for drugs, because crops in the hot weather, metabolism is strong, leaves stomata open, the drug is easy to enter the crop body and phytotoxicity.
Fourth, the high temperature weather is low in efficacy, the high temperature weather with heavy fog or dew is easy to be diluted by water and the effect of cheaper agent is reduced. In addition, when the morning dew is not dry, the temperature is relatively low, and the pest has not come out yet. not good. The best time to fight drugs: 8:00~10:00 in the morning and 5:00~7:00 in the afternoon. Avoid using well water to control the medicine. Because the well water contains calcium, magnesium and other minerals, it is easy to react with the chemical.
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