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将从田间感病品种原丰早上分离的稻瘟病原始菌株,接种在经三环哇处理过的该品种上,待其发病后,逐代重复分离诱导菌株,并对原始菌株和诱导菌林对三环唑的敏感性以及三环哇对它们的持效期进行了测定。结果表明:随诱导代次的增加,菌株对药剂的敏感性渐次降低,药剂对菌株的持效期明显缩短,但其致病性无明显变化趋势。
The original blast strain of Magnaporthe grisea, which was isolated from the field-susceptible cultivar Yuan-Feng, was inoculated on the variety treated with tricyclazole. After the onset of the disease, the induced strains were repeatedly isolated from generation to generation, Tricyclazole sensitivity and tricyclic wow their persistence were measured. The results showed that with the increase of induction generations, the sensitivity of the strain to the drug gradually decreased, and the persistence of the agent to the strain was significantly shortened, but the pathogenicity of the strain did not change significantly.