Yang Zi sent a WeChat message: On August 29th, the opponents used to fight the enemy, pymetrozine, buprofezin, tricyclazole, avermectin, if it does not rain or only the next rain within 7 days after application, need to prevent ?
Answer: The major drugs used before and after rice breakage period are to prevent and treat pests and diseases such as panicle blast, rice smut, sheath blight, rice leaf roller, aphid, and rice planthopper. Among them, panicle blast disease, rice smut disease and other diseases are affected by the weather, heading and flowering period, rainy days and more heavy disease, heading and flowering period, less rainy days and less incidence. Prevention of panicle blast disease and rice smut disease should be mainly used to prevent drug use. The above-mentioned drugs have a long duration of validity. If the rice has no rain or rainy days at the heading and flowering stage, appropriate control can be used to achieve a better control effect. However, from the perspective of improving control efficiency, it is advisable to use the drug for the first time. -7 days after treatment.
Tip: In recent years, Nilaparvata lugens has produced a relatively high level of resistance to buprofezin, and Thiamethoxam, dinotefuran, trifluacetan, pymetrozine, nitenpyram and other drugs should be replaced or combined.
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