Autor(es): Tsao, R; Reuber, M; Johnson, L; Coats, JR

Resumo: Glucosinolate components were extracted from defatted crambe (Crambe abyssinica Hochst ex. R. E. Fries) seed meal by using four different extraction solvents. These extracts containing naturally occurring glucosinolates were tested in bioassays against some selected agricultural and public health insect pests. The results showed that continuous aqueous exposure to dilutions of the extracts caused acute mortality to mosquito [Aedes aegypti (L.)] larvae. Crambe seed meal (containing intact glucosinolates) showed toxicity against house fly larvae (Musca domestica L.) when incorporated into the regular fly diet. Neither extracts nor seed meal were acutely toxic to the red flour beetle [Tribolium castaneum (Herbst)] or the sawtoothed grain beetle [Oryzeaphilus surinamensis (L.)] within 24 h; however, longer observation demonstrated a high mortality and antifeedant effect toward these insects. The two species of grain beetles began dying 10 d after exposure. The glucosinolate extracts also were effective on western corn rootworm [Diabrotica virgifera virgifera (LeConte)] larvae. No observable behavioral changes were found on German cockroaches [Blattella germanica (L.)]. The results showed that crambe glucosinolates have potential as a possible control agent for certain agricultural and public health insect pests.

Palavras-Chave: Natural Product; Glucosinolates; Crambe; Insecticidal Activity; Pest Control

Imprenta: Journal of Agricultural Entomology, v. 13, n. 2, p. 109-120, 1996

Descritores: Aedes aegypti - Public health

Data de publicação: 1996

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