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S-烯虫酯防治拟谷盗持效性及解毒酶功能影响研究
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Simulation Study on Long-Lasting Effectiveness of S-Methoprene on Tribolium Species and Activity of Detoxification Enzyme
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    摘要:

    在当前害虫抗药性强和社会安全健康意识增强的背景下,迫切需要开发生态友好的防治手段。因此,采用小麦入仓全仓拌和S-烯虫酯进行防治。通过分别扦取处理90天和365天后的小麦样品,在实验室内模拟了赤拟谷盗和杂拟谷盗的防治效果,并测定了S-烯虫酯对拟谷盗幼虫三种解毒酶的影响。研究结果表明,施药时间和虫态是影响S-烯虫酯杀虫效果的关键因素。在施用S-烯虫酯90天后的小麦样品中,武汉、成都和齐河3个品系的赤拟谷盗卵孵化率为0%,广东和北京2个品系的杂拟谷盗卵孵化率分别为1.67%±2.04%和0%。此外,施用S-烯虫酯90天后对赤拟谷盗和杂拟谷盗的杀蛹活性较好,羽化成虫无繁殖能力;施用365天后的杀蛹活性大大降低,羽化成虫有繁殖能力,而F1代蛹无法羽化。两处理组对两种成虫直接致死作用也有一定效果,但施用365天后的致死率大大降低,赤拟谷盗F1代仅有幼虫,而杂拟谷盗F1代有部分幼虫可化蛹但不能进一步转化为成虫。说明赤拟谷盗比杂拟谷盗更为敏感。S-烯虫酯胁迫之后,两种拟谷盗科幼虫体内的3种解毒酶活性受到了影响,且随着时间延长而增强。

    Abstract:

    In view of the prevailing insecticide resistance and increasing safety and health concerns, there is an urgent need to develop effective and environmentally friendly methods to control stored-product pests. S-methoprene, a microbial volatile compound with insecticidal properties, has been identified as a potential candidate for this purpose. However, its efficacy against storage pests is not well understood. In this study, wheat was treated with S-methoprene at a rate of 5 mg/kg and stored in ambient conditions within a grain bin. Samples were collected after 90 and 365 days, and bioassays were conducted on 20 mixed-sex developmental stages of Tribolium castaneum and T. confusum. S-methoprene showed significant ovicidal, pupicidal, and adulticidal activity against T. castaneum and T. confusum. The efficacy of S-methoprene was found to be influenced by the developmental stage of the pests and the timing of its application. In the 90-day treatment group, the hatching rate of three T. castaneum strains was zero, while that of T. confusum strains from Guangdong and Beijing was (1.67±2.04)% and 0%, respectively. S-methoprene treatment in the 90-day group resulted in effective pupicidal activity against both T. castaneum and T. confusum, with the F1 generation of adults being unable to reproduce. However, in the 365-day treatment group, the pupicidal activity significantly decreased, and the F1 generation of adults were able to reproduce but their F1 generation pupae can not hatch. The adulticidal activity of both pests had some effects in both treatments, but the mortality rate significantly decreased in the 365-day treatment group. The F1 generation of T. castaneum only consisted of larvae, while some larvae of T. confusum were able to pupate but could not further develop into adults. T. castaneum was found to be more susceptible to S-methoprene than T. confusum. After S-met hoprene induction, the activity of three detoxification enzymes in Tribolium species was affected in varying degrees and had different variation patterns. The activity was positively correlated with induction time.

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李燕羽,胡铁源,姜 雪,谢冰冰,王森山,宋丽雯,张洪清,穆海亮,王明亮. S-烯虫酯防治拟谷盗持效性及解毒酶功能影响研究[J].粮油食品科技,2023,31(5):42-52.

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  • 在线发布日期: 2023-09-26
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