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• W2019564056 abstract "The study investigated the insecticidal properties of four local medicinal plants–Ricinus communis Linn. (castor bean), Jatropha curcas Linn. (coral/purging nut), Anacardium occidentale Linn. (cashew nut), and Erythrophleum sauvelens (sasswood)–under laboratory conditions against two storage pests, Sitophilus zeamais (Motsch.) and Callosobruchus maculatus (F.), using two methods of treatment, topical application of crude powder water extracts and dried powder admixture in grains. The materials were tested at 0, 1, 5, 10, and 20 per cent concentrations. Contact toxicity, repellence, and inhibition of progeny emergence were monitored after treatments. At 20 per cent, Ricinus showed the highest repellence of C. maculatus (96.08%), followed by Jatropha (68.15%), Anacardium (62.30%) and Erythrophleum (25.40%), respectively. Against S. zeamais, Anacardium recorded 80.32 per cent repellence, followed by Ricinus (60%), Jatropha (58%) and Erythrophleum (10.02%). At lower concentrations (1, 5 and 10%), repellence of all the plant extracts did not seem to follow any trend. Dried ground seeds or powder water extract of the four plant materials at a dose of 5 per cent (w/w) significantly reduced progeny emergence in treated maize and cowpea grains. From the study, R. communis seems to be the best candidate among the four plant species tested. It is highly toxic, repellent, and inhibits progeny emergence to a larger extent than the other three plants. Jatropha curcas and A. occidentale were also very effective. It is, therefore, concluded that R. communis, J. curcas, and A. occidentale have great potential to develop into botanical pesticides and must be exploited.). Les propriétés insecticides de quatre plantes médicinales locales: Ricinus communis Linn. (haricot de ricin), Jatropha curcas Linn. (noix de purge/corail), Anacardium occidentale Linn. (noix de cajou), et Erythrophleum sauveolens (le mançone) étaient étudiées sous les conditions de laboratoire contre deux ravageurs de stockage: Sitophilus zeamais (Motsch.) et Callosobruchus maculatus (F.) en utilisant deux méthodes de traitement: application actuelle d'extraits de poudre brute en eau et la poudre sèche additionnée engrains. Les matières étaient mises á l'essai à 0, 1, 5, 10, et 20% de concentrations. Toxicité par contact, repoussement et l'inhibition de l'émergence de progéniture étaient suivies de près après les traitements. A 20%, Ricinus montrait le repoussement le plus élevé de C. maculatus (96.08%), suivi par Jatropha (68.15%), Anacardium (62.30%) et Erythrophleum (25.40%), respectivement. Contre S. zeamais, Anacardium donnait 80.32% de repoussement, suivi par Ricinus (60%), Jatropha (58%), et Erythrophleum (10.2%). Aux concentrations plus faibles de (1, 5 et 10%), le repoussement de tous les extraits de plantes ne donnaient pas l'impression de suivre aucune tendance. Les grains secs moulus ou l'extrait de poudre en eau des quatre matières de plantes à une dose de 5% (w/w) causaient des réductions considérables dans l'émergence de progéniture de grains de maïs et de dolique traités. D'aprè l'étude, R. communis semble être le meilleur spécimen de quatre espèces de plantes mises à l'essai. Elle est hautement toxique, repoussante et inhibe l'émergence de progéniture dans une plus grande mesure que les trois autres plantes. Jatropha curcas et A. occidentale étaient également très efficace. Donc, la conclusion est tirée que R. communis, J. curcas et A. occidentale ont beaucoup de potentiel pour le développement en pesticides botaniques et devraient être exploité. Ghana Journal of Agricultural Science Vol. 39 (2) 2006: pp. 147-154" @default.
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• W2019564056 title "Evaluation of four local plant species for insecticidal activity against <i>Sitophilus zeamais</i> Motsch. (Coleoptera: Curculionidae) and <i>Callosobruchus maculatus</i> (F) (Coleoptera: Bruchidae)" @default.
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