微生物源挥发性化合物苯并噻唑对灰霉病菌的抑制效应  

The Inhibition Effect of Microbial Volatile Compound Benzothiazole on Botrytis cinerea

作　　者：崔凯娣 黄学屏 何磊鸣 翟永彪 慕卫[1,3] 刘峰 

机构地区：[1]山东农业大学植物保护学院,山东泰安271018 [2]山东农业大学山东省蔬菜病虫生物学重点实验室,山东泰安271018 [3]山东省农药毒理与应用技术省级重点实验室,山东泰安271018

出　　处：《中国农业科学》2017年第19期3714-3722,共9页Scientia Agricultura Sinica

基　　金：国家重点研发计划(2016YFD0200500)

摘　　要：【目的】评价挥发性化合物苯并噻唑防治灰霉病的应用潜力,为进一步开发利用提供依据。【方法】采用密封盘菌丝生长速率法测定山东省73株灰霉病菌(Botrytis cinerea)对苯并噻唑的敏感性,并比较不同地区和不同表现型菌株(多菌灵抗性和敏感菌株:Car^R,Car^S;腐霉利抗性和敏感菌株:Prc^R,Prc^S;嘧霉胺抗性和敏感菌株:Pyr^R,Pyr^S;啶酰菌胺抗性和敏感菌株:Bos^R,Bos^S)间的敏感性差异;测定苯并噻唑与多菌灵、啶酰菌胺室内混用对灰霉病菌的抑制作用。通过离体黄瓜叶片接种试验验证苯并噻唑对黄瓜灰霉病的保护、治疗效果以及不同熏蒸剂量和时间对灰霉病菌致病力的影响,并用扫描电子显微镜观察苯并噻唑对灰霉菌丝形态的影响。【结果】苯并噻唑对灰霉病菌菌丝的EC50范围为0.38—1.08μL·L^(-1),均值为0.62μL·L^(-1),不同地区之间无敏感性差异;山东地区多菌灵、腐霉利、嘧霉胺、啶酰菌胺抗性和敏感灰霉病菌对苯并噻唑均比较敏感,说明这4种杀菌剂与苯并噻唑无交互抗性;在苯并噻唑0.1—3μL·L^(-1)范围内,菌丝比孢子对其更敏感;2μL·L^(-1)苯并噻唑对菌丝的抑制率高达86.12%,对芽管伸长的抑制率为55.15%,而对孢子萌发的抑制率仅为19.30%。可见,病菌不同生长阶段对此化合物的敏感性不同。苯并噻唑与多菌灵混用防治黄瓜灰霉病无增效或相加作用,两者混用时哪种药剂发挥主要抑菌作用与各组分在混用中使用的浓度和比例有关;苯并噻唑与啶酰菌胺混用有显著增效作用,其田间实际应用方式、效果以及增效机制还有待进一步明确。离体叶片试验表明,苯并噻唑对黄瓜灰霉病兼具保护和治疗防效,2μL·L^(-1)的治疗防效为91.01%,高于对照药剂啶酰菌胺300 mg·L^(-1)(78.90%),并显著高于48.25%的保护防效。苯并噻唑能够显著降低灰霉病菌菌丝的致病力,受抑制程度与苯并噻唑浓度呈�【Objective】The objective of this study is to evaluate the application potential of microbial volatile compound benzothiazole on Botrytis cinerea, and to provide a valuable information for further exploitation and utilization.【Method】The sensitivity of 73 B. cinerea isolates in Shandong Province to benzothiazole was measured by mycelium growth rate of sealed dishes method. The sensitivity differences among different regions and phynotypes of B. cinerea isolates（resistant and sensitive to carbendazim, procymidone, pyrimethanil or boscalid： Car^R, Car^S, Prc^R, Prc^S, Pyr^R, Pyr^S, Bos^R, Bos^S） were compared. The combination efficiencies on B. cinerea of benzothiazole with carbendazim or boscalid were determined. The protective and curative effect of benzothiazole against cucumber gray mold, and the effects of benzothiazole at different doses and fumigation times on the pathogenicity of B. cinerea were determined on detached cucumber leaves. The mycelial morphology of B. cinerea treated by benzothiazole was observed with scanning electron microscope（SEM）. 【Result】 All the tested B. cinerea isolates were sensitive to benzothiazole, range of EC50 from 0.38 to 1.08 μL·L^（-1）, with a mean EC50 value at 0.62 μL·L^（-1）. There was no sensitivity difference among different regions. All the phynotypes of isolates（Car^R, Car^S, Prc^R, Prc^S, Pyr^R, Pyr^S, Bos^R, Bos^S） were sensitive to benzothiazole, suggesting that there was no cross-resistance between these fungicides and benzothiazole. In the range of 0.1-3 μL·L^（-1）of benzothiazole, mycelia were more sensitive than spores to benzothiazole. The inhibition rate of 2 μL·L^（-1） benzothiazole for mycelial growth, germ tube elongation and spore germination was 86.12%, 55.15%, and 19.30%, respectively. It is suggested that the sensitivities of different growth stages of B. cinerea to benzothiazole were different. There was no synergism when benzothiazole combined with carbendazim, and which active ingredient performed the main

关 键 词：挥发性化合物 苯并噻唑 灰霉病菌 毒力 敏感性 

分 类 号：S432.4[农业科学—植物病理学]