Detection of the resistance of Botrytis cinerea to pyrimethanil from tomato in Beijing
This study was to detect the resistance to pyrimethanil of Botrytis cinerea isolated from tomato gray mold in Beijing. There were 109 single conidial isolates of B. Cinerea from tomato gray mold in 12 counties and districts. The resistance of these isolates to pyrimethanil was evaluated by the method of mycelial growth inhibition. The results showed that the ratio of resistant stains to pyrimethanil was 82. 57%, most of which were mainly highly resistant strains (78.89%). The EC50 of the most resistant strains was 5 096 times higher than that of the most sensitive isolates. The resistance of B. Cinerea to pyrimethanil was different in different regions. The ratio of high resistant strains to pyrimethanil was 66. 67% —100% in Yanqing County, Mentougou District, Tongzhou District, Daxing District and so on. The highly resistant isolates from Haidian District, Fangshan District and Chaoy-ang District were not found. The high-level resistance to pyrimethanil of B. Cinerea from tomato in Beijing is common. The management of tomato gray mold in Beijing should use novel fungicides.
NETL
NSTL
万方数据
维普
