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4 June 2020 Toxicological and histological studies on the effect of spinosad or vinegar on Culex pipiens larvae (Diptera: Culicidae)
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Abstract

Efficacy of Spintor® 24% SC (spinosad) and vinegar were studied to control Culex pipiens larvae by testing different concentrations of spinosad (10, 50, 100, 500 and 1000 µl/10 ml) or vinegar (125, 250, 500 and 750 µl/10 ml). The percentage mortality of larvae was increased by increasing concentrations and time. While 100 % mortality was obtained at the concentration 1000 µl/10 ml of spinosad after 48 h, in the case of vinegar treatment 100 % mortality was obtained at the concentration of 750 µl/10 ml after 72 h. Both spinosad and vinegar exhibited a histological effect on the midgut by degeneration of the epithelial cells, the disintegration of the plasma and basement membranes and extensive disruption of the cellular microvillar. Generally, spinosad manifested a higher level of activity against Cu. pipiens larvae than vinegar.

©Entomological Society of Southern Africa
T.S. El Sayed, R.M. Sayed, S.A. Rizk, and R.S. Abdalla "Toxicological and histological studies on the effect of spinosad or vinegar on Culex pipiens larvae (Diptera: Culicidae)," African Entomology 28(1), 175-181, (4 June 2020). https://doi.org/10.4001/003.028.0175
Received: 10 April 2019; Accepted: 6 October 2019; Published: 4 June 2020
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