【类型】期刊
【题名】Sensitivity baseline to pydiflumetofen in Passalora fulva and control efficacy of pydiflumetofen against tomato leaf mold.
【关键词】 田间防效 氟唑菌酰羟胺 敏感基线 pydiflumetofen sensitivity baseline 杀菌活性 番茄叶霉病菌 control efficacy activity of fungicide Passalora fulva
【期刊名】Chinese Journal of Pesticide Science / Nongyaoxue Xuebao
【摘要】Pydiflumetofen is a novel succinate dehydrogenase inhibitor (SDHI), which shows excellent inhibitory activity to many plant pathogens, such as Fusarium graminearum and Sclerotinia sclerotiorum. In this study, the sensitivity to pydiflumetofen of Passalora fulva strains collected from 8 cities in Shandong Province were tested by using mycelial growth rate method. In addition, the control efficacy of pydiflumetofen to tomato leaf mold were also investigated in field. The results showed that pydiflumetofen had strong inhibitory activity on three developmental stages of P. fulva, and the inhibitory activities on spore gemination and germ tube elongation were higher than that on mycelial growth. Inhibition rate of pydiflumetofen to spore gemination and germ tube elongation of P. fulva was over 50% at 0.10 μg/mL. The EC50 values frequency distribution of 103 P. fulva isolates to pydiflumetofen on mycelial growth was a unimodal curve and could be regarded as the baseline sensitivity. The EC50 values ranged from 0.04 to 1.74 μg/mL, with a mean of (0.67 ± 0.41) μg/mL. In field trials of two years, after the last application at the dose of 200 g a.i./hm², the control efficacy of pydiflumetofen was above 80%, which was significantly higher than that of thiophanate-methyl (540 g a.i./hm² ) and fluopyram (150 g a.i./hm² ). This study provides data support for monitoring the resistance of tomato leaf mold to pydiflumetofen and for efficient controlling tomato leaf mold.
【年份】2022
【ISSN】1008-7303
【页码】66-72
【期号】1
【作者单位】1山东农业大学 植物保护学院/山东省蔬菜病虫生物学重点实验室/山东省高校农药毒理与应用技术重点实验室, 山东 泰安 271018. 2山东农业大学 化工与材料科学学院, 山东 泰安 271018.
【期刊卷】24
【全文阅读】 获取全文