译 名：
Sensitive Baseline of Rhizoctonia solani to Difenoconazole and Prochloraz in Northeast Three Province
作 者：
LIAN Na-na;JI Ming-shan;QI Zhi-qiu;WEI Song-hong;College of Plant Protection, Shenyang Agricultural University;
关键词：
Rhizoctonia solani;;difenoconazole;;prochloraz;;baseline sensitivity
摘 要：
[Aims] This study aims to detect the sensitivity of Rhizoctonia solani populations to difenoconazole and prochloraz in northeast three province. [Methods] The mycelium growth rate method was used to test the sensitivity of100 strains to difenoconazole and prochloraz. [Results] The EC50 values of all isolates to difenoconazole and prochloraz ranged from 0.0612 to 115.2462 mg/L and 10.665 to 76.8512 mg/L, respectively. The frequency distribution of difenoconazole sensitivity in R. solani populations was approximately normal distribution. However, the frequency distribution of prochloraz sensitivity in R. solani populations did not confirm to the normal distribution. The mean EC50 values, 29.3614 and 19.8194 mg/L, for all isolates in a right unimodal curve distribution was treated as the sensitivity baseline of R. solani to difenoconazole and prochloraz, respectively. There was not significantly correlation between the sensitivity of all isolates to difenoconazole and prochloraz and the geographical origin of the strain, so did the efficient correlation between difenoconazole and prochloraz. [Conclusions] The sensitivity changes of the R. solani populations to prochloraz should be paid much attention, alternate use with other types of fungicides should be recommended to prolong the service life of such agents.
