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首页> 外文期刊>Pest Management Science >Biological activity of the succinate dehydrogenase inhibitor fluopyram against Botrytis cinerea and fungal baseline sensitivity
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Biological activity of the succinate dehydrogenase inhibitor fluopyram against Botrytis cinerea and fungal baseline sensitivity

机译：琥珀酸脱氢酶抑制剂氟吡草胺对灰葡萄孢的生物学活性和真菌基线敏感性

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摘要

BACKGROUND: Succinate dehydrogenase inhibitors (SDHIs) constitute a fungicide class with increasing relevance in crop protection. These fungicides could play a crucial role in successful management of grey mould disease. In the present study the effect of fluopyram, a novel SDHI fungicide, on several developmental stages of Botrytis cinerea was determined in vitro, and the protective and curative activity against the pathogen was determined on strawberry fruit. Furthermore, fungal baseline sensitivity was determined in a set of 192 pathogen isolates. RESULTS: Inhibition of germ tube elongation was found to be the most sensitive growth stage affected by fluopyram, while mycelial growth was found to be the least sensitive growth stage. Fluopyram provided excellent protective activity against B. cinerea when applied at 100 μg mL~(-1) 96,48 or 24 h before the artificial inoculation of the strawberry fruit. Similarly, fluopyram showed a high curative activity when it was applied at 100 μg mL~(-1) 24 h post-inoculation, but, when applications were conducted 48 or 96 h post-inoculation, disease control efficacy was modest or low. The measurement of baseline sensitivity showed that it was unimodal in ail the populations tested. The individual EC_(50) values for fluopyram ranged from 0.03 to 0.29 μg mL~(-1). In addition, no correlation was found between sensitivity to fluopyram and sensitivity to other fungicides, including cyprodinil, fenhexamid, fludioxonil, iprodione, boscalid and pyraclostrobin. CONCLUSIONS: The obtained biological activity, baseline sensitivity and cross-resistance relationship data suggest that fluopyram could play a key role in grey mould management in the near future and encourage its introduction into spray programmes.
机译：背景：琥珀酸脱氢酶抑制剂（SDHIs）构成了与农作物保护相关性越来越高的杀菌剂。这些杀真菌剂可能在成功控制灰霉病中起关键作用。在本研究中，测定了一种新型SDHI杀菌剂氟吡草胺对灰葡萄孢菌几个发育阶段的作用，并确定了对草莓果实的病原菌的保护和治疗活性。此外，在一组192种病原体中确定了真菌的基线敏感性。结果：抑制胚芽管伸长是受氟吡菌胺影响最敏感的生长阶段，而菌丝体生长则是最不敏感的生长阶段。在草莓果实的人工接种前96、48或24 h，氟吡虫啉对灰质芽孢杆菌具有优异的保护作用。同样，氟吡虫草在接种后24小时以100μgmL〜（-1）施用时显示出高治愈活性，但是，在接种后48或96 h施用时，疾病控制效力中等或较低。基线敏感性的测量结果表明，在所有测试人群中，它都是单峰的。氟吡虫草的单个EC_（50）值介于0.03至0.29μgmL〜（-1）之间。此外，在对氟吡草胺的敏感性与对其他杀菌剂的敏感性之间没有相关性，包括环丙啶，苯六胺，氟地西尼，异丙隆，鲍卡利斯和吡咯菌胺。结论：获得的生物活性，基线敏感性和交叉耐药关系数据表明，氟吡草胺在不久的将来可在灰霉病管理中发挥关键作用，并鼓励将其引入喷雾计划。

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