Role of the predator Anisops sardea (Hemiptera: Notonectidae) in control mosquito Culex pipiens molestus (Diptera: Culicidae) population

摘要

The presence of the predators can alter the prey niche in the community. We evaluated the influence ofthe predator, Anisops sardea on mosquito Culex pipiens molestus population by predation, and nonconsumptiveeffect by life-cycle prolongation in predator presence and residual kairomones. Thepredation depends on prey density, individual A. sardea predated 16.0-19.7 and 24.7-29.3 3rd larvae/ dayat the densities 50 and 100 larvae / liter respectively, with clearance rate 0.19 and 1.1 for those densities.The predatory impact along four days within 8 hours daytime ranged between 0.98-1.20. The non-contactpresence of the predator folded the larval stadium from 11.9 in contract to 23.7 days while it increased to16.0 days at residual kiromone, the pupal stadium in control 5.8 days, then increased to 7.8 days in thetwo treatments. Thus, release of notonectid A. sardea will effectively control C. pipiens molestus bypredation and besides decrease number of generations through immature stages extension. A. Sardea canbe actively used as essential factor in integrated vector control.