The synergistic effect of octopamine receptor agonists on selected insect growth regulators on Culex quinquefasciatus Say (Diptera: Culicidae) mosquitoes
| Autor: | Mohamed Ahmed Ibrahim Ahmed, Christoph F.A. Vogel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Insecticide resistance
030231 tropical medicine Chlordimeform Pharmacology 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine parasitic diseases Bioassay 030212 general & internal medicine Lufenuron Amitraz Novaluron lcsh:R5-920 biology fungi Public Health Environmental and Occupational Health Culex quinquefasciatus Mosquito control biology.organism_classification Octopamine receptor agonists (OR agonists) Infectious Diseases Diflubenzuron chemistry Pyriproxyfen IGRs lcsh:Medicine (General) |
| Zdroj: | One Health, Vol 10, Iss, Pp 100138-(2020) |
| ISSN: | 2352-7714 |
| Popis: | Synergistic effects of octopamine receptor agonists (OR agonists) have attracted many scientists based on their potent effects on mosquitoes. Herein, we determined the toxicity of selected insect growth regulators (IGRs) on fourth instar larvae of Culex quinquefasciatus. We evaluated the synergistic action of OR agonists on the toxicity of IGR insecticides to achieve a better understanding of their mode of action. As a result, pyriproxyfen was the most potent IGR insecticide (EC50 = 0.049 ng/ml) followed by lufenuron, novaluron, and diflubenzuron according to the IGR bioassay. Further, based on the acute bioassay, lufenuron was the most toxic IGR insecticide (LC50 = 44 ng/ml) after 24-h post treatment followed by pyriproxyfen, novaluron, and diflubenzuron (LC50 = 137, 263, and 1127 ng/ml, respectively). Similar tendency was observed after 48 and 72-h post treatment. Furthermore, OR agonists that combined with pyriproxyfen was the most significant effects after 48 and 72-h of exposure. The synergism with amitraz (AMZ) was more significant when co-treated with IGR insecticides compared to chlordimeform (CDM). These findings suggest that OR agonists are promising tools and are important alternative strategies as synergistic compounds in preventing and controlling Culex quinquefasciatus mosquitoes. |
| Databáze: | OpenAIRE |
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