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There is an art to spraying cotton, and methods matter even more in unfavorable weather

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When spraying pesticides on cotton to control pests and diseases, unfavorable weather often affects spray quality, reduces control effectiveness, and can even cause pesticide damage. In response to this situation, in production practice I have adopted the following countermeasures according to different weather changes and achieved relatively good control results. Windy days On windy days, spraying pesticides causes uneven pesticide coverage on cotton plants, affecting control effectiveness. In response to this situation, pesticide varieties with systemic action and strong penetration can be selected. When spraying, the nozzle should be closer to the cotton plants to prevent the spray mist from being blown away by the wind and causing loss,

When spraying pesticides on cotton to control pests and diseases, unfavorable weather often affects spray quality, reduces control effectiveness, and can even cause pesticide damage. In response to this situation, in production practice I have adopted the following countermeasures according to different weather changes and achieved relatively good control results.

Windy days On windy days, spraying pesticides causes uneven pesticide coverage on cotton plants, affecting control effectiveness. In response to this situation, pesticide varieties with systemic action and strong penetration can be selected. When spraying, the nozzle should be closer to the cotton plants to prevent the spray mist from being blown away by the wind and causing loss. At the same time, the operator should spray from the upwind side to prevent the pesticide liquid from being blown into the respiratory tract and causing poisoning.

Cloudy and rainy days When spraying pesticides to control pests and diseases during continuous cloudy and rainy days, the pesticide liquid is easily washed off by rainwater, affecting control effectiveness. In response to this situation, fast-acting pesticide varieties with strong contact action and quick knockdown can be selected. After rain or during a break in the rain, appropriately increase the pesticide liquid concentration, reduce the pesticide liquid volume, and spray quickly and evenly on the cotton plants, using the rainwater on the cotton plants to dilute the pesticide so that the cotton plants receive uniform pesticide coverage, thereby improving control effectiveness.

High-temperature days Especially at noon with strong sunlight, if spraying is needed, do not choose pesticides that decompose easily when exposed to light (such as phoxim) or highly toxic pesticides. Pesticides with high efficiency, low toxicity, and increased effectiveness with temperature can be selected. When spraying, appropriately reduce the pesticide liquid concentration and increase the pesticide liquid volume to prevent excessively rapid water evaporation under strong sunlight from causing leaf scorching and personnel poisoning.

Dewy and foggy days There are many dew droplets on cotton leaves, and the pesticide liquid easily drips off with the dew. In response to this situation, spraying can adopt an ultra-low-volume spray method with high concentration and fast speed, so that the pesticide liquid drifts evenly onto the cotton plants, using dew to moisten the pesticide, saving energy and improving effectiveness. At the same time, the operator should walk on the upwind side to prevent poisoning.

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