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Effect of two microbial insecticides on aquatic predators of mosquitoes

Effect of two microbial insecticides on aquatic predators of mosquitoes

Journal of Applied Entomology 103(2): 113-118

Aquatic mosquito predators were fed with Culex quinquefasciatus Say fourth-instar larvae intoxicated with either Bacillus sphaericus or B. thuringiensis var. israelensis preparations. Although the mosquito larvae contained large amounts of the bacterial preparations in their gut, no effect upon longevity or ability to molt was observed in the backswimmer Notonecta undulata Say (Heter., Notonectidae), in naiads of the dragonfly Tarnetrum corruptum Hagen (Odon., Libellulidae), or in naiads of the damselfly Enallagma civile (Hagen) (Odon., Coenagrionidae). Equally, the reproduction of N. undulata and the predation rate and ability to emerge normally in T. corruptum and E. civile were not affected by ingestion of large amounts of bacterial toxins.

Accession: 001578448

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DOI: 10.1111/j.1439-0418.1987.tb00966.x

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