A: Before and after rice breaks, the main drugs are used to control diseases such as rice smut, panicle blast, sheath blight, rice leaf roller, and rice planthopper.
Twelve percent of Jinggangzheng Pesticide Chemical Co., Ltd. of Tongzhou Zhengda Pesticide Chemical Co., Ltd. of Jiangsu Province contains 4% of Jinggangmycin and 8% of tebuconazole. It is registered for the control of rice smut, sheath blight, and rice blast disease. The recommended dosage of hectares of pure medicine is 180-207 grams, equivalent to 100-115 grams per acre. Tricyclazole is suitable for the control of rice blast, generally 70% tricyclazole 20-30 grams per mu. Chlorpyrifos is suitable for the control of rice planthoppers and rice leaf roller. Generally, it uses 45% chlorpyrifos 60-90 ml per mu. The application of the above formulation during the rice break period has better control effect on the early instars of panicle blast, sheath blight, rice planthopper and rice leaf roller.
Tip: chlorpyrifos has a good quick-response, no internal absorption conductivity, a short duration of validity, and has a poor control effect on older insects of rice leaffolder, which has been damaged by leaf rolling. To prevent and control old-age insects of rice leaffolder, chlorantraniliprole, fluorobenzamide, indoxacarb and other drugs should be used. Prevention of rice planthoppers should use chlorpyrifos and pymetrozine, nitenpyram, flonicamid, dinotefuran, thiamethoxam and other long-acting drugs to improve control efficiency.
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