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沈阳农业大学植物保护学院研究证实,辽宁省稻瘟病菌对稻瘟灵基本仍处于敏感至低抗水平。科研人员利用菌丝生长速率法,测定了自辽宁省主产稻区2009～2010年分离的87株稻瘟病菌对稻瘟灵的敏感性。结果表明,稻瘟灵的抑制中浓度EC50值为0.35～7.01微克/毫升,敏感性差异达20倍,且2009年稻瘟病菌对稻瘟灵的敏感性高于2010年。根据野生敏感型病原群体对药剂敏感性呈正态分布的原理,辽宁省稻瘟病菌对稻瘟灵的敏感性基线定为(1.77±0.80)微克/毫升,辽宁省主要稻区均有抗稻瘟灵菌株出现,除2010年在铁岭稻产区监测到1株中抗菌
Research Institute of Plant Protection, Shenyang Agricultural University confirmed that the rice blast fungus in Liaoning Province is still sensitive to the low level of resistance to rice blast. Researchers use mycelial growth rate method to determine the susceptibility of 87 isolates of Magnaporthe grisea to rice blast from 2009 to 2010 in the main rice producing areas of Liaoning Province. The results showed that the inhibitory concentration of rice blast was EC50 of 0.35 ~ 7.01 μg / ml with a sensitivity difference of 20-fold, and 2009 blast fungus blastao sensitivity than in 2010. According to the principle that the sensitivity of wild-sensitive pathogens to the drug is normal, the baseline sensitivity of M. grisea to rice blast in Liaoning Province was (1.77 ± 0.80) micrograms / milliliter, and the main rice-growing areas in Liaoning Province had anti-rice Epiphytic strains appeared, except in 2010 in Tieling paddy areas monitored in a strain of antibacterial