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Methoxyfenozide, a Molting Hormone Agonist, Affects Autogeny Capacity, Oviposition, Fecundity, and Fertility in Culex pipiens (Diptera: Culicidae).

Authors
  • Hamaidia, Kaouther1, 2
  • Soltani, Noureddine2
  • 1 Department of Biology, Faculty of Nature and Life Sciences, Mohamed Cherif Messaadia University, Souk-Ahras, Algeria. , (Algeria)
  • 2 Laboratory of Applied Animal Biology, Faculty of Sciences, Department of Biology, University Badji Mokhtar of Annaba, Annaba, Algeria. , (Algeria)
Type
Published Article
Journal
Journal of Medical Entomology
Publisher
Oxford University Press
Publication Date
May 15, 2021
Volume
58
Issue
3
Pages
1004–1011
Identifiers
DOI: 10.1093/jme/tjaa260
PMID: 33247298
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The current study aimed to evaluate the effects of methoxyfenozide (RH-2485), an insect growth disrupter (IGD) belonging to molting hormone agonist class, against female adults of Culex pipiens L. under laboratory conditions. Lethal concentrations (LC50 = 24.54 µg/liter and LC90 = 70.79 µg/liter), previously determined against fourth instar larvae, were tested for adult female fertility, fecundity and oviposition after tarsal contact before mating and any bloodmeal. Methoxyfenozide was found to alter negatively their autogeny capacity and oviposition. A strong reduction of 56% and 72% (P < 0.001) in females' autogeny capacity was observed in both treated series, respectively. Alteration in oviposition were found to be higher with LC90 (OAI-LC90 = -0.62) than with the LC50 (OAI-LC50 = -0.42). Also fecundity and hatching rate (fertility) were significantly reduced in treated series as compared to controls. A significant reduction of 37.65 and 28.23% in fecundity and decrease of 56.85 and 71.87% in fertility were found, respectively in LC50 and LC90 treated series. Obtained data clearly demonstrated that methoxyfenozide have significant depressive effect on reproductive potential against medically important vector with minimizing ecotoxicological risks in mosquitoes management. © The Author(s) 2020. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: [email protected]

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