Influence of five different larval control agents on oviposition of Culex pipiens L. (Diptera: Culicidae)

AKINER M. M., Ekşi E.

Journal of The European Mosquito Control Association, vol.33, pp.5-9, 2015 (Peer-Reviewed Journal)


The effects of five different and widely used mosquito control agents (monomolecular film [MMF], diflubenzuron, Bacillus thuringiensis var. israelensis [Bti], Bacillus sphaericus [Bs] and temephos) on Culex pipiens L. oviposition were studied in both field and laboratory conditions. Half of the standard application dosages were used for all five control agents. Results were evaluated weekly for three weeks. All tested mosquito populations (Serik, Avariz, Slab and field) showed different degrees of oviposition preferences on experimental and control cups and pools. Culex pipiens L. tended to lay a lower number of eggs for tests groups than the control group throughout the whole test duration. Oviposition preferences of all Cx. pipiens decreased in the second week (except temephos both Avariz and field test, MMF both control and field test, Bs both Serik and control) and increased again in the third week. The repellent effects of MMF and temephos on oviposition were found to be higher than for the other larvicides. Mosquito species use different chemical cues for finding an ovipositional site. Therefore MMF and temephos may help in future control efforts, albeit less than the diflubenzuron, Bti and Bs on mosquitoes and mosquito-borne disease epidemics.