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Chemical Characterization and Insecticidal Activity of Ethyl Acetate and Dichloromethane Extracts of Drypetes gossweileri against Sitophilus zeamais, Tribolium castaneum and Rhyzopertha dominica

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Journal of Life Sciences 2013年第10期7卷 1030-1040页

作者： Aba Toumnou Lucie Seck Dogo Lakouetene Didier Ponel Beranger bolevane ouantinam serge florent Gueye Momar Talla Traore Anna Namkosserena Salomon Noba Kandioura Sembene Mbacke Syssa-Magale Jean-Laurent Regional Centre for Studies on the Improvement of Plant Adaptation to Drought Thies 3320 Senegal Regional Centre for Ecotoxicology Studies and Chemical Environment Security (CERES-Locustox) Dakar 3300 Senegal Department of Natural sciences University of Bangui Bangui 908 Central Africa Republic Institut of Food Technology Dakar 2765 Senegal Regional Pole of Applied Research to Development Farming Systems in Central Africa (PtL4SAC) N 'Djamena 764 Chad Department of Plant Biology Cheikh Anta Diop University Dakar 5005 Senegal Department of Animal Biology Cheikh Anta Diop University Dakar 5005 Senegal

The use of botanical pesticides in pest management during storage against insects is often encouraged because synthetic insecticides produce undesired effects. Bark powder ofDrypetes gossweileri is used by farmers in pest management in Central Africa Republic. Hexane, dichloromethane, ethyl acetate and methanol were used for extraction bark powder by maceration. Insecticidal activity of the extracts was tested on Sitophilus zeamais, Tribolium castaneum and Rhy_-opertha dominica. The mortality rate, the number of surviving insects and the number of emerged insects were measured variables. Calculated mortality was obtained by applying Aboth＇s formula. The variables are submitted to variance analysis, model with four factors （plants, insects, doses and time） in Minitab 14. The results of analysis showed that the mortality rate has a very highly significant variation following extracts, doses, insects and time considered （P 〈 0.001）. Extracts with ethyl acetate and dichloromethane of D. gossweileri are effective against S. zeamais and R. dominica at high doses （1, 0.5, 0.250 g/10 mL of solvent）. These effective extracts were characterized by gas chromatography coupled with mass spectrometry. Molecules such as l-isothiocyanatomethyl, thiocyanic acid, phenylmethyl ester and other were characterizated. These results may consolidate traditional use olD. gossweileri in pest management.

关键词： Control stored grains pests' management Drypetes gossweileri.

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The Efficient Role of Dermestes in Damage of Fish in Bangui (Central African Republic)

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Advances in Entomology 2015年第3期3卷 111-117页

作者： bolevane-ouantinam serge florent Aba-Toumnou Lucie Gondi Armelle Judith Wango Solange Patricia Zinga Innocent Namkosséréna Salomon Lakouèténé Didier Ponel-Béranger Kongueret Ernest Semballa Silla Laboratory of Applied Animal Biology and Biodiversity University of Bangui Bangui Central African Republic Laboratory of Biological and Agronomical Sciences for Development Bangui Central African Republic Regional Pole of Applied Research to Development Farming Systems in Central Africa (PRASAC) Djamena Chad Central African Republic Institute of Agronomical researches (ICRA) Bangui Central African Republic

A bad conservation of food is recognized as being one of the critical constraints upon food security among resource poor population across Africa. We have evaluated the traditional management of pests in fish in Central African Republic. The data were analyzed by a factor analysis of correspondence. The Group I contained sensitive species of fish to the attacks of Dermetes frishii, Dermetes lardarius and Dermestes carnivorus. There were: Labeocoubie, Mormyrus deliciosus, Polydactylus quadrifilis, Auchenoglanis occidentalis, Synodontis nigrita, Hydrocynus forskalli, Districhodus rostratus, Hydrocynus goliath and Mormyrusrume. The group II contained sensitive species of fishes to the attacks of D. maculatus. There were: Cyprinus carpio, Malapterurus electricus, Oreochromis mossambicus, Barbus occidentalis and Oreochromis mossambicus. Clariasgariecilus is the mostsensitive of dried fish to the attacks of Dermestes. Oreochromis mossambicus, Mormyrusrume and Synodontis nigrita are the last sensitive of dried fish to the attacks of Dermestes. The results showed that the tradictional management of dried fish in Central African Republic couldn’t be efficient for reducing the development of Dermestes.

关键词： Traditonal Management Pests Dried Fish

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Pest Management of Storage Pests Using Extracts of Afrostyrax lepidophyllus against Sitophilus zeama＇（s, Tribolium castaneum and Rhyzopertha dominica

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Journal of Agricultural Science and Technology(B) 2014年第1期4卷 58-66页

作者： Aba Toumnou Lucie Gueye Momar Talla bolevane Ouatinam serge florent Traore Anna Gueye Sabelle Lakouetene Didier Ponel Beranger Namkosserena Salomon Ndoye Ousmane Syssa-Magale Jean-Lauren Noba Kandioura Sembene Mbacke Seck Dogo Faculty of Sciences University of Bangui Bangui Central Africa Republic lnstitut of Food Technology Dakar 3300 Senegal Regional Centre for Ecotoxicology Studies and Chemical Environment Security (CERES-Locustox) Dakar 3300 Senegal Regional Pole of Applied Research to Development Farming Systems in Central Africa (PRASAC) Bangui Central Africa Republic West and Central African Council for Agricultural Research and Development Dakar 18523 Senegal Faculty of Sciences Cheikh Anta Diop University Dakar 5005 Senegal

The use of botanical pesticides in pest management during storage against insects is often encouraged because synthetic insecticides produce multiple side-effects on human health and environment. Insecticidal activity of the hexane, dichloromethane, ethyl acetate and methanol extracts of bark ofAfrostyrax lepidophyllus was tested on Sitophilus zeama~：~, Tribolium castaneum and Rhy-opertha dominica. The mortality rate was measured variable. The results of analysis showed that the mortality rate has a very highly significant variation following extracts, doses, insects and time considered （P 〈 0.001）. Extracts with ethyl acetate and hexane of A. lepidophyllus are effective against S. zeamais at the highest doses （1 g/10 mL and 0.5 g/10 mL of solvent）. These effective extracts werc characterized by gas chromatography coupled with mass spectrometry. Molecules such as thiocyanic acid, ethyl ester： dimetbylditbiophosphinic acid and other were characterizated. These results may consolidate traditional use ofA. lepidophylh^s in pest management.

关键词： Control stored grains pests management Afrostyrax lepidophyllus.

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