Effect of Weekly Releases of Toxorhynchites amboinensis (Doleschall) on Aedes aegypti (L.) (Diptera: Culicidae) in New Orleans, Louisiana

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Abstract
Weekly releases of the larval predator, Toxorhynchites amboinensis (Doleschall), into a 16-block neighborhood with substandard housing in New Orleans, La., during 1982 reduced Aedes aegypti (L.) densities by ca. 45% when compared with similar, but untreated areas. Increasing the number of adults released per week from 100 to 300 females per block did not improve the degree of control achieved, indicating that lower release numbers may be adequate to achieve this level of control. Releasing 100 predators per block resulted in a 40% reduction in Culex quinquefasciatus Say. Examining the area surrounding the study site revealed that there was very little movement of T. amboinensis females between blocks during the 7-month study. The results suggest that it may be possible to develop a practical method to control A. aegypti mosquitoes in urban areas using T. amboinensis .

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