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福建省玉米小斑病菌对氟啶胺的敏感性及其与不同杀菌剂间的交互抗性 被引量:1

Sensitivity of southern corn leaf blight pathogen Cochliobolus heterostrophus to fluazinam and cross-resistance against diverse fungicides in Fujian Province
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摘要 为明确福建省玉米小斑病菌Cochliobolus heterostrophus对氟啶胺的敏感性及其与不同杀菌剂间的交互抗性,采用菌丝生长速率法测定了该省5个地区的73株玉米小斑病菌菌株对氟啶胺的敏感性。结果表明,供试73株玉米小斑病菌菌株对氟啶胺具有较高的敏感性,所有菌株的有效抑制中浓度EC50在0.0023~1.2863μg/mL之间,平均值为0.2573μg/mL,其敏感性频率呈连续单峰曲线分布,符合正态分布,因此可将EC50平均值0.2573μg/mL作为福建省玉米小斑病菌对氟啶胺的敏感基线;5个地区的菌株群体对氟啶胺的敏感性差异不显著,但是不同地区的菌株个体间差异较大;氟啶胺与多菌灵、百菌清、丙环唑、烯唑醇、咪鲜胺和异菌脲之间均不存在交互抗性。 To determine the sensitivity of southern corn leaf blight pathogen Cochliobolus heterostrophus to fluazinam, and evaluate the cross-resistance between fluazinam and other fungicides, a total of 73 C. heterostrophus isolates collected from five regions in Fujian Province were used for testing their sensitivity to fluazinam using mycelial growth method. The tested isolates were highly sensitive to fluazinam, and the EC50 of these isolates to fluazinam were in the range of 0.0023-1.2863 μg/mL, with the mean value of 0.2573 μg/mL. The frequency curve of fluazinam was continuous and unimodal, and followed the normal distribution. Hence, the mean EC50 of 0.2573 μg/mL could be served as the baseline sensitivity of C. heterostrophus to fluazinam in Fujian Province. There was no significant difference in the sensitivity to fluazinam among C. heterostrophus populations from five regions; nevertheless, there was an obvious difference in the sensitivity to fluazinam among individual isolate from different regions in Fujian Province. There was no notable evidence of positive cross-resistance between fluazinam and carbendazol, chlorothalonil, propiconazole, diniconazole, prochloraz, and iprodione.
作者 代玉立 甘林 石妞妞 陈福如 杨秀娟 Dai Yuli;Gan Lin;Shi Niuniu;Chen Furu;Yang Xiujuan(Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests,Institute of Plant Protection,Fujian Academy of Agricultural Sciences,Fuzhou 350013,Fujian Province,China)
出处 《植物保护学报》 CSCD 北大核心 2018年第6期1374-1380,共7页 Acta Phytophylacica Sinica
基金 福建省自然科学基金(2016J05073) 福建省农业科学院博士启动基金(2015BS-4) 福建省农业科学院植物保护创新团队(STIT2017-1-8).
关键词 玉米小斑病菌 氟啶胺 敏感基线 交互抗性 Cochliobolus heterostrophus fluazinam baseline sensitivity cross-resistance
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