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Effect of water hyacinth leaf extract on mortality, growth and metamorphosis of certain pests of stored products
Published online by Cambridge University Press: 19 September 2011
Abstract
Petroleum ether extract of Eichhornia crassipes (Mart) Solm. was evaluated for its biological activity against Tribolium castaneum (Herbst), Sitophilus oryzae (L.), Callosobruchus maculatiti (F.) and Corcyra cephalonica (Stainton). The crude extract included in the diet of insects retarded development and caused mortality in the fourth instar larvae of T. castaneum and C. cephalonica. Cuticle melanization in patches were observable in C. cephalonica larvae. High mortality of adult C. maculatus occurred in insects confined to the treated diet as well as in insects exposed to treated surfaces. The extract did not show any toxicity to adult S. oryzae.
Résumé
L'extrait de pétrole d'ether du Eichhornia crassipes été évalue pour l'activité biologique contre Tribolium castaneum (Herbst), Sitophilus oryzae (L), Callosobruchus maculatus (F) et Corcyra cephalonica (Stainton). L'extrait été inclus dans le nouriture de l'insects qui retardé le development et la mort de larves du T. castaneum et C. cephalonica. Nous avon observé l'melanisation d'épiderme chez lez larves du C. cephalonica. La mortalite' été plus élevé chez les adulte due C. maculatus qui été élevé sur l'nouriture traité. Les insects adulte du S. oryzae néte pas éffecté par l'extrait.
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