Insecticidal activity of three insect growth regulators towards the dengue and Zika virus vector Aedes aegypti in Saudi Arabia

Abstract

Objectives: To explore the insecticidal activity of insect growth regulators (IGRs) against the dengue vector Aedes aegypti (Ae. aegypti) (Diptera: Culicidae) in Saudi Arabia.Methods: LC50 and LC90 values were calculated in laboratory conditions using Probit analysis.Results: I tested three selected insect growth regulators (IGR) Diflox flowable, Sumilarv and Baycidal. The results explored that, among three IGRs, the highest larval and pupal mortality was observed for diflox flowable, with 0.178 ppm (larva) and 0.178 ppm (pupae) followed by sumilarv i.e. 0.146 (larvae)0.146 (pupae) and baycidal i.e. 0.142 (larva) and 0.115 (pupae) ppm respectively. Concerning adult emergence inhibition, Sumilarv 0.5G was more effective (IC50 = 0.0004ppm) than Diflox Flowable (IC50 = 0.002ppm) and Baycidal 25 wp (IC50 = 0.047ppm) by about 5.75 and 117.5 folds, respectively.Conclusions: Overall, this study highlighted that the insect growth regulators (IGRs) could be used as a poential larvicidal compounds against the dengue vector Ae. aegypti.