四氯虫酰胺亚致死胁迫对胡瓜新小绥螨捕食效能的影响
Sublethal effect of tetrachlorantraniliprole on the predatory capacity of Neoseiulus cucumeri
李亚迎，刘明秀，宋雪纯，李士家，马方芳，张开军，相 栋，陈翰秋，尼玛玉珍，刘 怀
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DOI：10.7679/j.issn.2095-1353.2024.066
作者单位：西南大学植物保护学院，昆虫学及害虫控制工程重庆市重点实验室，长江上游农业生物安全与绿色生产教育部重点实验室，重庆 400715
中文关键词：胡瓜新小绥螨；四氯虫酰胺；亚致死效应；捕食功能反应；捕食速率
英文关键词：Neoseiulus cucumeris; tetrachlorantraniliprole; sublethal effect; function response; predatory rate
中文摘要：
摘 要 【目的】 本研究旨在研究亚致死浓度四氯虫酰胺对胡瓜新小绥螨Neoseiulus cucumeris (Oudemans)捕食作用的影响，进而评价其对天敌捕食螨的安全性。【方法】 在实验室内条件下，采用叶片残毒法和二次中毒法进行四氯虫酰胺对胡瓜新小绥螨雌成螨的毒力测定，并测定亚致死剂量（LC15、LC30）的四氯虫酰胺对胡瓜新小绥螨雌成螨取食柑橘始叶螨 Eotetranychus kankitus (Ehara)的捕食量、捕食功能反应及捕食速率的影响。【结果】 叶片残毒法和二次中毒法测定四氯虫酰胺对胡瓜新小绥螨的LC50分别为400.29和3.86×105 µg/mL。亚致死剂量的四氯虫酰胺处理下胡瓜新小绥螨对柑橘始叶螨各个螨态的功能反应类型均为Holling-Ⅱ，但其参数发生改变，其对叶螨的最大日捕食量降低，处理猎物的时间延长。此外，在亚致死剂量四氯虫酰胺胁迫下，胡瓜新小绥螨对柑橘始叶螨的捕食量和捕食速率均降低。【结论】 四氯虫酰胺对胡瓜新小绥螨存在副作用，影响捕食螨的控害能力，与捕食螨联合使用时应间隔一定的安全期后再释放天敌捕食螨。
英文摘要：
Abstract [Aim] This study investigates the sublethal effects of tetrachlorantraniliprole on the predatory efficacy of Neoseiulus cucumeris (Oudemans), a known predator of citrus the yellow mite. The safety of tetrachlorantraniliprole for these predatory mites was also evaluated. [Methods] The toxicity of tetrachlorantraniliprole on N. cucumeris was assessed under laboratory conditions using the leaf-dip method and the secondary poisoning phenomenon method. Additionally, the influence of sublethal doses of tetrachlorantraniliprole (LC15 and LC30, with water as a control) on the prey consumption, functional response, and predatory rate of female N. cucumeris preying on Eotetranychus kankitus (Ehara) was determined. [Results] The LC50 of tetrachlorantraniliprole on N. cucumeris, based on the leaf residue method and the secondary poisoning phenomenon methods, was 400.289 and 3.86×105 µg/mL, respectively. The functional response type of female N. cucumeris to E. kankitus was not affected by exposure to sublethal concentrations of tetrachlorantraniliprole and remained at Holling-Ⅱ. However, exposure of N. cucumeris to sublethal concentrations of tetrachlorantraniliprole resulted in increased prey handling time and a decrease in the maximum daily prey consumption. Furthermore, when exposed to sublethal concentrations of tetrachlorantraniliprole, the consumption and predation rate of N. cucumeris on E. kankitus significantly decreased. [Conclusion] The findings of this study indicate that tetrachlorantraniliprole has a negative effect on the predatory capacity of N. cucumeris. Therefore, a certain safety interval should be maintained when releasing N. cucumeris in conjunction with the use of tetrachlorantraniliprole.