When applying **fungicides** to cotton seedlings, it's essential to follow certain guidelines to maximize their effectiveness and ensure plant health. First, understanding the type of fungicide you're using is crucial. There are two main categories: **protective fungicides**, which prevent disease before it occurs, and **curative fungicides**, which are used after symptoms appear to stop or slow the spread of infection. Protective options include products like Bordeaux mixture, mancozeb, and carbendazim, while curative ones such as anti-Qingning and Baozhida work best when applied early in the infection process.
It's also important to time your application properly. Fungicides should be sprayed either before 9 a.m. or after 4 p.m. to avoid the intense midday sun, which can cause the product to break down quickly and reduce its effectiveness. Spraying during hot, sunny conditions may lead to evaporation and poor absorption by the plants.
Another key point is to avoid mixing fungicides with **alkaline pesticides**, as this can neutralize their active ingredients and reduce performance. Always follow the recommended dosage and do not alter the concentration unless advised by a professional. It's also important to use the correct dilution method—always mix the fungicide with water first, then stir thoroughly with a stick. If combining with other pesticides, make sure to dilute the fungicide first and then mix it into the solution.
Most fungicides come in powder, emulsion, or suspension form, so proper dilution is necessary before application. Finally, maintain a spraying interval of 7 to 10 days. For **pesticides** that don’t adhere well or aren’t absorbed systemically, reapplication is necessary if rain occurs within three hours of spraying. This helps ensure continuous protection and prevents the loss of efficacy due to weather conditions. By following these practices, you can enhance the performance of your fungicides and promote healthier cotton seedlings.
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