Résumé

Current researches for mosquito control have focused on insect specific insecticides without
environmental concerns. The present study was conducted to evaluate the Ovicidal activity of an
ecdysone agonist (methoxyfenozide) on Culex pipiens L. (Culicidae: Diptera) under laboratory
conditions using standard WHO protocol. Lethal concentrations (LC50= 24.54 μg/L and LC90= 70.79
μg/L) previously determined were tested against freshly laid eggs. The egg viability was examined and
the deferred effects of treatment were also investigated on the development duration and the sex ratio.
Data obtained show that egg hatching inhibition was dose dependent, with a reduction of 13.44% and
46.99% with LC50 and LC90, respectively. In treated groups, the total development duration was
significantly longer as compared to controls. The adult sex - ratio was significantly skewed in favor of
males emerged from treated eggs with LC50 and LC90 of methoxyfenozide. Moreover, changes in the egg
shell morphology and abnormal egg hatching pattern were observed. Morphologic abnormalities in larva
were also recorded. Data from the current investigation clearly demonstrated that methoxyfenozide
possess remarkable larvicidal and ovicidal activities against a medically important vector as ideal ecofriendly
approach for mosquito’s control.

Information

Item Type:	Journal
Divisions:	» Laboratoire des Ecosystèmes Aquatiques et Terrestres » Faculté des Sciences de la Nature et de la Vie
ePrint ID:	620
Date Deposited:	2016-12-03
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/620

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