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Effect of Hydrogen Peroxide on Oviposition Site Preference and Egg Hatching of the Aedes aegypti (Linnaeus) Mosquito

Luka Ndungu,Donald R. Roberts,Lewis Long,Emilie Goguet,Alex Stubner,Sean Beeman,Stephen Lewandowski,Bernard Okech

Published 2025 in Insects

ABSTRACT

Simple Summary Aedes aegypti (Linnaeus, 1762) mosquitoes, which spread diseases such as dengue and Zika, lay their eggs in water-filled containers in the environment. Hydrogen peroxide is a chemical naturally found in rainwater and other water sources, but its effects on mosquito oviposition choice preference and egg hatching are not well understood. This study tested whether concentrations of hydrogen peroxide (5 to 100 μM) influence where mosquitoes lay their eggs and whether their eggs can still hatch. In experiments offering many choices, mosquitoes laid eggs even in cups with hydrogen peroxide, but when given only two options, water and hydrogen peroxide, they preferred cups without hydrogen peroxide. For egg hatching, long exposure to hydrogen peroxide did not have much effect, but short exposure to higher concentrations increased the number of eggs that hatched. These findings suggest that hydrogen peroxide in the environment can sometimes change mosquito egg-laying behavior and may affect egg hatchability under specific conditions. Understanding these effects can help us predict how natural water chemistry shapes mosquito oviposition behavior and could inform new ways to manage mosquito populations and reduce disease spread.

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