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What are the precautions for using fungicides during the cotton seedling stage?

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1. When choosing a fungicide, first understand the nature of the fungicide. There are two types of fungicides: one is a protective agent, which is used to prevent plants from developing disease, such as Bordeaux mixture, mancozeb, and carbendazim; the other is a therapeutic agent, which is applied after plants have developed disease to kill or inhibit the pathogens that have invaded the plant body. Therapeutic agents work better when applied in the early stages of disease, such as compound fungicides like kangkuening and baozhida. 2. Fungicides should be sprayed before 9 a.m. or after 4 p.m. If sprayed under the scorching sun, the chemicals break down and evaporate easily,

1. When choosing a fungicide, first understand the nature of the fungicide. There are two types of fungicides: one is a protective agent, which is used to prevent plants from developing disease, such as Bordeaux mixture, mancozeb, and carbendazim; the other is a therapeutic agent, which is applied after plants have developed disease to kill or inhibit the pathogens that have invaded the plant body. Therapeutic agents work better when applied in the early stages of disease, such as compound fungicides like kangkuening and baozhida.

2. Fungicides should be sprayed before 9 a.m. or after 4 p.m. If sprayed under the scorching sun, the chemicals break down and evaporate easily, which is not conducive to crop absorption.

3. Fungicides must not be mixed with alkaline pesticides. Do not arbitrarily increase or decrease the dosage of fungicides, and they should be used immediately after mixing.

4. Fungicides are mostly powders, emulsions, and suspension concentrates, and must be diluted before application. When diluting, add the chemical first, then the water, and stir with a stick. When mixing with other pesticides, the fungicide should also be diluted first and then mixed into the other pesticides.

5. The interval between fungicide spray applications is 710 days. For chemicals with weak adhesion and poor systemic absorption, if it rains within 3 hours after spraying, re-spray after the rain.

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