Lethal and Sublethal Concentrations of Formulated Larvicides Against Susceptible Aedes aegypti.

IF 0.9 4区农林科学 Q3 ENTOMOLOGY

Journal of the American Mosquito Control Association Pub Date : 2022-12-01 DOI:10.2987/22-7084

Robert L Aldridge, Barry W Alto, C Roxanne Connelly, Bernard Okech, Blair Siegfried, Kenneth J Linthicum

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引用次数: 2

Abstract

Chemical control of vectors depends on the effective application of formulated insecticides. In this study we evaluated formulated larvicides using a larval bioassay against susceptible Aedes aegypti. The estimated larvicide lethal concentrations for 50% mortality (LC50s) were 25.7 μg/liter (Natular 2EC), 3.13 μg/liter (Abate 4E), 0.43 μg/liter (Altosid), 0.03 μg/liter (Nyguard), and 500.6 ITU/liter (VectoBac12AS containing Bacillus thuringiensis israelensis). Sublethal effects were identified and documented from adults that survived exposure to these estimated LC50s (body size and sex proportion). We observed changes in net growth as measured by adult wing lengths. For those larvae exposed to estimated LC50s, the average size of adults was between 0.1% and 10.6% smaller for males and between 1.1% and 13.6% smaller for females compared to controls. Sex proportions varied between larvicides, but some were significantly different from the control, favoring greater survival of females than males.

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配制杀幼虫剂对易感埃及伊蚊的致死和亚致死浓度。

病媒的化学控制取决于配方杀虫剂的有效应用。在这项研究中，我们用幼虫生物测定法评价了配制的杀幼虫剂对易感埃及伊蚊的作用。50%死亡率的杀幼虫剂致死浓度(lc50)分别为25.7 μg/l (Natular 2EC)、3.13 μg/l (Abate 4E)、0.43 μg/l (Altosid)、0.03 μg/l (Nyguard)和500.6 ITU/l(含苏云金芽孢杆菌的VectoBac12AS)。从暴露于这些估计lc50(体型和性别比例)的存活成人中确定并记录了亚致死效应。我们观察到净生长的变化，通过测量成人的翅膀长度。对于那些暴露于估计lc50的幼虫，与对照组相比，成年雄虫的平均尺寸小0.1%至10.6%，雌虫的平均尺寸小1.1%至13.6%。不同杀幼虫剂的性别比例不同，但有些杀幼虫剂与对照有显著差异，雌性的存活率高于雄性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the American Mosquito Control Association 生物-昆虫学

CiteScore

2.10

自引率

10.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of the American Mosquito Control Association (JAMCA) encourages the submission of previously unpublished manuscripts contributing to the advancement of knowledge of mosquitoes and other arthropod vectors. The Journal encourages submission of a wide range of scientific studies that include all aspects of biology, ecology, systematics, and integrated pest management. Manuscripts exceeding normal length (e. g., monographs) may be accepted for publication as a supplement to the regular issue.