With most of the rice in the province currently in the heading and flowering stage, recent rainfall has increased and temperatures have dropped. This weather condition creates an ideal environment for the development of rice false smut disease. If left unchecked, this disease can significantly reduce rice yields and lower the quality and market value of the grain. Rice infected with false smut often becomes inedible, making timely application of effective fungicides essential.
Copper high-grade 27.12% basic copper sulfate suspension is a highly efficient, broad-spectrum, and environmentally friendly fungicide that is registered for use against rice smut, rice blast, tomato early blight, apple ring spot, and citrus canker. It is particularly effective in controlling rice false smut, a common and damaging disease in rice fields.
For preventive treatment, it is recommended to spray the solution once every 5–7 days before the rice panicle emerges and after heading. The application rate is 30 ml of the 27.12% copper sulfate suspension mixed with 30 kg of water per acre. Once the disease is detected—typically when more than 80% of the infected grains show small yellow bacterial spots—increase the dosage to 50 ml of the product mixed with 30–40 kg of water per acre. Applying it during sunny conditions helps kill the bacteria, causing them to shrink and fall off, thus minimizing contamination of healthy grains.
According to pesticide guidelines, this product offers excellent efficacy, is safe for crops, and works well when combined with other pesticides. Always mix it with water first before adding other chemicals. It should be applied in the later growth stages of rice to avoid affecting the heading process and should not be used during the flowering period to prevent any negative impact on pollination.
By following these guidelines, farmers can effectively manage rice false smut while maintaining crop health and maximizing yield potential. Regular monitoring and timely intervention are key to preventing widespread damage and ensuring a successful harvest.
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