在半田间条件下,评估 In2care 蚊子站对库蚊(双翅目:库蚊科)的防治效果。

Eva A Buckner, Ana L Romero-Weaver, Sierra M Schluep, Shawna K Bellamy, Rebecca A Zimler, Natalie L Kendziorski, Daviela Ramirez, Shelley A Whitehead
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摘要

五带喙库蚊是一种重要的蚊媒,负责传播丝虫、节肢动物传播的病毒(如奥罗波切病毒、圣路易斯脑炎和西尼罗河病毒)以及导致禽类疟疾的原生动物。由于世界各地的五步蛇种群对杀虫剂产生抗药性,病媒综合管理计划可以从控制该物种的新策略中获益。In2Care 蚊子站(In2Care 站)是一种含有吡丙醚(PPF)和巴氏杆菌孢子的商用传播站,在之前进行的半田间试验和实地试验中,该传播站已被证明能有效控制跳蚤埃及伊蚊和白纹伊蚊。为了确定五步蛇雌成虫自动传播 PPF 的潜力,以及 In2Care 站是否可用于防治五步蛇,我们在半田间环境中评估了它对野生五步蛇的功效。我们发现 In2Care 工作站对怀孕的五步蛇雌性具有吸引力,与其他产卵器相比,产在 In2Care 工作站的卵排比例要高得多。成年雌性成功地将 PPF 从 In2Care 站自动传播到周围的产卵池,从而显著提高了蚊子出现的抑制率。此外,Cx. quinquefasciatus 成蚊接触 B. bassiana 孢子后,存活率明显降低。这些结果表明,除埃及伊蚊和白纹伊蚊外,In2Care 防治站还可能对五步蛇伊蚊有效。需要进行更多的实地评估,以评估对种群的影响。
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Evaluation of the In2care Mosquito Station against Culex quinquefasciatus mosquitoes (Diptera: Culicidae) under semifield conditions.

Culex quinquefasciatus is an important mosquito vector responsible for the transmission of filarial worms, arthropod-borne viruses like Oropouche, St. Louis encephalitis, and West Nile and protozoans that cause avian malaria. Due to insecticide resistance documented in Cx. quinquefasciatus populations worldwide, integrated vector management programs can benefit from new strategies to control this species. The In2Care Mosquito Station (In2Care station), a commercially available dissemination station containing pyriproxyfen (PPF) and Beauveria bassiana spores, has been shown to be effective against skip-ovipositing Aedes aegypti and Aedes albopictus in previously conducted semifield and field trials. To determine the potential of Cx. quinquefasciatus adult females to autodisseminate PPF and if the In2Care station could be used for Cx. quinquefasciatus control, we assessed its efficacy in a semifield setting against wild Cx. quinquefasciatus. We found that the In2Care station was attractive to gravid Cx. quinquefasciatus females, with a significantly higher percentage of egg rafts laid in the In2Care station compared to alternative ovipots. Adult females successfully autodisseminated PPF from the In2Care station to surrounding ovipots, leading to a significant increase in mosquito emergence inhibition. Additionally, adult Cx. quinquefasciatus exposure to B. bassiana spores significantly reduced mosquito survivorship. These results suggest that the In2Care station may be effective against Cx. quinquefasciatus in addition to Ae. aegypti and Ae. albopictus. Additional field evaluations are needed to assess impacts at the population level.

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