Selective effect of myclobutanil enantiomers on fungicidal activity and fumonisin production by Fusarium verticillioides under different environmental conditions
Selective effect of myclobutanil enantiomers on fungicidal activity and fumonisin production by Fusarium verticillioides under different environmental conditions
复制标题
不同环境条件下腈菌唑对映体对轮枝镰刀菌杀菌活性和伏马菌素产生的选择性影响
DOI：
10.1016/j.pestbp.2017.12.010
复制
发表时间：
2018-05-01
影响因子：
4.7
通讯作者：
Liu, Chenglan
中科院分区：
文献类型：
--
作者：
Li, Na;Deng, Luqing;Liu, Chenglan
Myclobutanil is a widely used triazole fungicide, comprising two enantiomers with different fungicidal activities, non-target toxicities, and environmental fates. The enantioselective effects of myclobutanil on fumonisin B (FB) production by Fusarium verticillioides, an important pathogen, have not yet been investigated. In the present study, the fungicidal activities of rac-myclobutanil and its enantiomers on F. verticillioides cultured on maize-based media were studied under different water activity and temperature conditions. The FB levels were measured to assess the enantioselective effects on FB production when F. verticillioides were cultured treated with EC50 and EC90 concentrations (concentrations inhibiting mycelial growth by 50.0% and 90.0%, respectively) of myclobutanil and enantiomers under different conditions. The fungicidal activities of rac-myclobutanil and its enantiomers decreased with increasing temperature and decreasing water activity. Little difference in fungicidal activity was observed between the enantiomers. FB production was significantly influenced by temperature, a(w), and fungicides dose. At EC50 concentrations, rac-myclobutantil and its enantiomers were shown to enhance mycotoxin production and enantioselective effects of enantiomers on FB production were observed under certain conditions. This is the first report on the differential effects of myclobutanil enantiomers on the control of F. verticillioides growth and FB production in maize-based media under different conditions.
