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Rice blast is a kind of fungicide which is recommended to be used in rice in China at present. In order to evaluate it in paddy field ecosystem behavior is systematically studied Pyricularia amide and its preparation used in paddy field in paddy water and paddy soil and rice plant residue degradation and in the soil adsorption law and its main influencing factors.
2, rice blast amide use method
Fenoxanil genus phenoxy amide fungicides, the mechanism of melanin biosynthesis inhibitor, mainly inhibit the columella spore ketone dehydrogenase activity, which inhibits the formation of Magnaporthe grisea melanin. With good and excellent effects of aspiration, after application of newly expanded leaves also have very good effect, spraying 40 days can still inhibit lesion of spore shedding and flying, so as to avoid secondary infection. Product for 20% suspending agent.
In the 5-30 days before heading, stop the application 14 days before harvest. According to another report, in foreign countries there are granules for broadcast. 
The prevention and control of rice blast in 5~30 days before heading, with 35 acres of preparation to 65 ml, and the water spray. 14 days before harvest to stop spraying. According to another report, in foreign countries there are granules for broadcast.