农药学学报2016，Vol.18Issue(6)：703-709,7.DOI:10.16801/j.issn.1008-7303.2016.0098
水稻恶苗病菌田间抗咪鲜胺菌株的适合度及其交互抗性
Fitness and cross-resistance ofFusarium fujikuroi strains resistant to prochloraz from field
摘要
Abstract
Bakanae disease is the most notorious seed-borne fungus disease affecting rice. Prochloraz, an imidazole fungicide with broad-spectrum and systemic activity, is the most widely used chemical for the control of this disease at present. Prochloraz-resistant and prochloraz-sensitive strains ofFusarium fujikuroi collected from fields were used in this study to characterize their fitness and cross-resistance between prochloraz and other fungicides. The results showed that most of the resistant strains could be inherited stably. No difference was observed between the resistant and sensitive strains in terms of temperature sensitivity. With regards to mycelial growth rate, conidium production, conidium germination rate and pathogenicity, some of the resistant strains were significantly higher than those of the sensitive ones. There is no cross-resistance found among prochloraz, triazoles and 2-cyanoacrylate fungicides. This study showed that some fieldF. fujikuroi strains with resistance to prochloraz had a strong fitness, which might develop into dominant population in the fields. In order to slow down the development of fungicide resistance, fungicides with different modes of action should be alternately applied in the field.关键词
水稻恶苗病菌/咪鲜胺/抗药性/适合度/交互抗性Key words
Fusarium fujikuroi/prochloraz/resistance/fitness/cross-resistance分类
农业科技引用本文复制引用
周俞辛,刘永锋,于俊杰,俞咪娜,尹小乐,王亚会,杜艳,齐中强,宋天巧,张荣胜..水稻恶苗病菌田间抗咪鲜胺菌株的适合度及其交互抗性[J].农药学学报,2016,18(6):703-709,7.基金项目
江苏省农业科技自主创新资金(CX (15)1054)；公益性行业(农业)科研专项(201303023) （CX (15）
