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Baseline sensitivity of Botrytis cinerea to fluazinam and cross‐resistance
Author(s) -
Liu Shengming,
Fu Liuyuan,
Chen Jinpeng,
Wang Shuan,
Jiang Jia,
Zhang Yong,
Che Zhiping,
Tian Yuee,
Chen Genqiang
Publication year - 2019
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12805
Subject(s) - botrytis cinerea , fungicide , carbendazim , pyrimethanil , biology , mycelium , horticulture , iprodione , antifungal , botany , microbiology and biotechnology
Grey mould, caused by the fungus Botrytis cinerea Pers ex Fr., is a very destructive and important disease worldwide. Fluazinam is a phenylpyridinamine fungicide with broad‐spectrum activities. The baseline sensitivity of B. cinerea to fluazinam is yet to be established in Henan Province, China. In this study, a total of 117 field isolates of B. cinerea were collected from 49 commercial greenhouses in different locations of Henan Province, in 2016, and the sensitivities of these isolates to fluazinam were determined based on mycelial growth. The effective concentration for 50% (EC 50 ) values ranged from 0.0038 to 0.0441 μg/ml, and the mean EC 50 value was 0.0201 ± 0.0081 μg/ml for mycelial growth. The frequency distribution range presented a unimodal curve. To define the cross‐resistance relationships, the linear correlation coefficients of the EC 50 values between fluazinam and carbendazim, procymidone, pyrimethanil or boscalid were analysed. The results showed that no correlation was observed between fluazinam and the other tested fungicides. These results provide important information to growers for the prevention and control of grey mould.