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首页> 外文期刊>Pest Management Science >Lack of cross-resistance to a novel succinate dehydrogenase inhibitor, fluopyram, in highly boscalid-resistant isolates of Corynespora cassiicola and Podosphaera xanthii
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Lack of cross-resistance to a novel succinate dehydrogenase inhibitor, fluopyram, in highly boscalid-resistant isolates of Corynespora cassiicola and Podosphaera xanthii

机译：缺乏对新的琥珀酸脱氢酶抑制剂氟吡菌胺的交叉耐药性，该菌株对菜青虫和小菜蛾具有高度抗鳞片病的能力

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BACKGROUND: Recently in Japan, isolates resistant to boscalid, a succinate dehydrogenase inhibitor (SDHI), have been detected in Corynespora cassiicola (Burk. & Curt.) Wei and Podosphaera xanthii (Castaggne) Braun & Shishkoff, the pathogens causing Corynespora leaf spot and powdery mildew disease on cucumber, respectively. Resistant isolates of C. cassiicola are widely distributed and represent a serious problem in disease control at present. Novel SDHI fungicides, including fluopyram, are now under development. RESULTS: The growth of very highly boscalid-resistant, highly resistant and sensitive isolates of C. cassiicola was strongly suppressed on fluopyram-amended YBA agar medium. Although boscalid and another SDHI, penthiopyrad, hardly controlled Corynespora leaf spot and powdery mildew on cucumber plants when very highly or highly boscalid-resistant isolates were employed for inoculation, fluopyram still exhibited excellent control efficacy against these resistant isolates as well as sensitive isolates of C. cassiicola and P. xanthii. CONCLUSION: Differential sensitivity to boscalid, penthiopyrad and fluopyram, clearly found in these two important pathogens of cucumber, may indicate involvement of a slightly distinct site of action for fluopyram from the two other SDHIs. This finding may lead to the discovery of unique SDHIs in the future.
机译：背景：最近在日本，已在卡尼氏菌（Corynespora cassiicola）（Burk。＆Curt。）Wei和Podosphaera xanthii（Castaggne）Braun＆Shishkoff中发现了对琥珀酸脱氢酶抑制剂（SDHI）的抗病菌的分离物，该病原体导致了卡氏菌的斑点和黄瓜上的白粉病。卡西氏梭菌的抗性分离株分布广泛，目前代表着疾病控制中的严重问题。新型的SDHI杀菌剂，包括氟吡草胺，正在开发中。结果：在经氟吡草胺修饰的YBA琼脂培养基上，强烈抑制了卡西氏梭菌的极高抗虫害性，高抗性和敏感性的菌株的生长。尽管当使用非常抗或高度抗鳞片菌病的菌株进行接种时，黄瓜上的boscalid和另一种SDHI（戊硫吡喃德）几乎不受控制，Corynespora叶斑病和白粉病都得到了接种，但氟吡草胺仍显示出优异的防治效果，可对抗这些抗性菌株和敏感的C菌种cassiicola和P. xanthii。结论：在这两种黄瓜的重要病原体中清楚地发现了对Boscalid，penthiopyrad和flupyyram的敏感性不同，这可能表明它与其他两个SDHIs的flupyyram作用部位略有不同。这一发现可能会导致将来发现独特的SDHI。

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