Baseline sensitivity of natural populations and characterization of resistant strains of Botrytis cinerea to fluazinam

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• 作者：Wenyong Shao ; Weichao Ren ; Yu Zhang ; Yiping Hou…
• 关键词：Fluazinam ; Botrytis cinerea ; Baseline sensitivity ; Resistance
• 刊名：Australasian Plant Pathology
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：44
• 期：4
• 页码：375-383
• 全文大小：3,583 KB
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• 作者单位：Wenyong Shao (1)
  Weichao Ren (1)
  Yu Zhang (1)
  Yiping Hou (1)
  Yabing Duan (1)
  Jianxin Wang (1)
  Mingguo Zhou (1)
  Changjun Chen (1)
  
  1. Key Laboratory of Pesticide, College of Plant Protection, Nanjing Agricultural University, Jiangsu Province, Nanjing, 210095, China
  
• 刊物主题：Plant Pathology; Plant Sciences; Agriculture; Entomology; Ecology;
• 出版者：Springer Netherlands
• ISSN：1448-6032

文摘

This study examined the baseline sensitivity of field populations of Botrytis cinerea before exposure to the fungicide fluazinam and evaluated the risk of fluazinam resistance. The mean EC50 (half maximal effective concentration) and minimum inhibitory concentration (MIC) for fluazinam were 0.0196?μg/mL and-lt;-?μg/mL, respectively. Five fluazinam-resistant strains were selected from wild-type isolates on potato dextrose agar (PDA) containing sub-lethal concentrations of fluazinam. The fluazinam-resistant strains were less fit than their parental isolates based on radial mycelial dry weight, pathogenicity and spore production. Moreover, on PDA amended with NaCl, the laboratory fluazinam-resistant strains grew slower than their fluazinam-sensitive parental isolates, especially at high concentrations of NaCl. Cross-resistance occurred between fluazinam and the dicarboximide procymidone and the phenylpyrrole fludioxonil.