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Effects of Azadirachtin on the Development and Mortality of Lutzomyia longipalpis Larvae (Diptera: Psychodidae: Phlebotominae)

The effects of azadirachtin A added to the standard diet on the development, mortality, and metamorphosis of Lutzomyia longipalpis Lutz & Neiva, 1912 were studied. Concentrations of 0.1, 1.0, and 10.0 μg of azadirachtin/mg of diet significantly increased larval mortality in comparison with nontr...

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Bibliographic Details
Published in:Journal of medical entomology 2006-03, Vol.43 (2), p.262-266
Main Authors: Coelho, Claudia Alves Andrade, de Souza, Nataly Araújo, Feder, Maria Denise, da Silva, Carlos Eugênio, Garcia, Elói de Souza, Azambuja, Patricia, Gonzalez, Marcelo Salabert, Rangel, Elizabeth F.
Format: Article
Language:English
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Summary:The effects of azadirachtin A added to the standard diet on the development, mortality, and metamorphosis of Lutzomyia longipalpis Lutz & Neiva, 1912 were studied. Concentrations of 0.1, 1.0, and 10.0 μg of azadirachtin/mg of diet significantly increased larval mortality in comparison with nontreated insects. Concentrations 0.1 and 1.0 μg blocked the molt of larvae, which remained as third instars until the end of the experiment. The 10 μg/mg concentration resulted in greater molt inhibition. In this group, all insects stopped their development as second instars. Simultaneous addition of ecdysone (1 μg/mg) to the standard diet containing azadirachtin counteracted the effects of azadirachtin on mortality and inhibition of ecdysis. These results indicate that azadirachtin is a potent growth inhibitor of L. longipalpis.
ISSN:0022-2585
1938-2928
DOI:10.1603/0022-2585%282006%29043%5B0262%3AEOAOTD%5D2.0.CO%3B2