Abstract

Aims: In the present study, the objective was to estimate the toxicity of an insect growth
regulator with juvenile hormone-like activity, kinoprene, on Culex pipiens, the most
abundant and investigated mosquito species. Effects of this compound on growth and
development were also evaluated.
Methodology: A commercial formulation (Enstar 65% EC) was tested at different
concentrations ranging between 162.5 and 650μg/L on newly molted fourth-instar larvae
that were exposed for 24 h under standard laboratory conditions according to World
Health Organization recommendations.
Results: Kinoprene exhibited insecticidal activity by direct action on the treated fourthinstar
larvae but also by differed action on the other following stages of development.
Mortality occurred after earlier inhibition of their development or by their inability to
complete their ecdysis. The LC50 values were 1287.4μg/L for the direct action on fourth
instar larvae, and 246.8μg/L for the differed action until adult emergence. Moreover, the
compound disturbed growth and development since several morphological types and an
increase in the duration of larval and pupal stages were recorded. In a second series of
experiments, the effects of kinoprene were examined on morphometric measurements of larvae, pupae and adults, respectively. The compound affected body volume.
Conclusion: The overall results are discussed in relation to previous reports and
suggested that kinoprene have potential as a biorational insecticide for controlling of
mosquitoes in an environmentally-friendly manner to the aquatic ecosystem.

Information

Item Type:	Journal
Divisions:	» Faculty of Natural Sciences and Life
ePrint ID:	619
Date Deposited:	2016-12-03
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/en/publication/article/619

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