中文摘要：黄色镰刀菌是各种杂草和作物的全球性真菌病原体。三唑是管理镰刀菌最有效的杀菌剂，但它们对黄色镰刀菌的比活度尚不清楚。本文通过研究发现使用杀菌剂可能不是黄色镰刀菌进化的驱动力，而一个抗性性状的效益可能不超过其成本。
外文摘要：BACKGROUNDFusarium culmorum is a fungal pathogen occurring worldwide on various weeds and important crops. Triazoles have been shown to be the most effective fungicide for managing Fusarium spp., but little is known about their specific activity on F. culmorum. RESULTSThe sensitivity of 107 F. culmorum strains to triazoles was assessed using microtitre plate assays. The EC50 values ranged from 0.14 to 1.53 mg L−1 for tebuconazole and from 0.25 to 2.47 mg L−1 for epoxiconazole. Cross-resistance to both azoles was found (r = 0.61). F. culmorum appeared to be significantly more sensitive than F. graminearum or F. cerealis. No increase in the mean EC50 was observed over time, which might be related to an unfavourable fitness cost, measured here as fungal growth. On average, nivalenol-producing strains of F. culmorum were significantly more resistant than deoxynivalenol-producing strains. The relationship between resistance and chemotype-dependent adaptation to oxidative stress was investigated, but remained unclear. No link between inter-simple sequence repeat (ISSR) genetic diversity and triazole resistance could be established. CONCLUSIONFungicide use might not be a driving force in the evolution of F. culmorum, and the benefit of a resistance trait probably does not outweigh its costs.
外文关键词：DMI fungicide；resistance；ISSR fingerprinting；chemotype, mating type
作者：Hellin, P；Scauflaire, J；Van Hese, V；Munaut, F；Legreve, A
作者单位：Catholic Univ Louvain
期刊名称：PEST MANAGEMENT SCIENCE
期刊影响因子：2.811
出版年份：2017
出版刊次：6
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