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Field experiments were conducted in the dry season of 1985–86 and the first and second rainy seasons of 1986 at Ibadan, Nigeria, to assess the level of damage and yield reductions caused by Eldana saccharina Walker to maize. Grain weight per plant in artificially infested plots was up to 36% lowe...


Bosque Pérez, N.A.Mareck, J.H.[Effect of stem borer Eldana saccharina (Lepidoptera: Pyralidae) on the yield of maize]Effect of stem borer Eldana saccharina (Lepidoptera: Pyralidae) on the yield of maize
Bosque Pérez, N.A.Buddenhagen, I.W.[Studies on epidemiology of virus diseases of chickpea in California]Studies on epidemiology of virus diseases of chickpea in California

Sesamia calamistis Hampson and Eldana saccharina Walker larvae were reared at 25°C on pieces of stem from five indigenous African grasses. All five, Andropogon sp., Panicum maximum Jacq., Pennisetum polystachion (L.) Schult., P. purpureum L. and Sorghum arundinaceum (Desv.) Stapf. have been repor...


Shanower, T.G.Schulthess, F.Bosque Pérez, N.A.[The effect of laval diet on the growth and development of Sesamia calamistis Hampson (Lepidoptera: Noctuidae) and Eldana saccharina Walker (Lepidoptera: PYralidae)]The effect of laval diet on the growth and development of Sesamia calamistis Hampson (Lepidoptera: Noctuidae) and Eldana saccharina Walker (Lepidoptera: PYralidae)
Fremier, Alexander K.DeClerck, Fabrice A.J.Bosque Pérez, N.A.Estrada Carmona, Natalia[Understanding spatiotemporal lags in ecosystem services to improve incentives]Understanding spatiotemporal lags in ecosystem services to improve incentives

The effects of maize variety and storage form on development of the maize weevil, Sitophilus zeamais Motschulsky, were studied under artificial infestation at 25 ± 2 °C and 70 ± 5% r.h. in the laboratory. Three improved West African maize varieties, Abeleehi, EV8725-SR, Pop63-SR and the local var...


Vowotor, K.A.Bosque Pérez, N.A.Ayertey, J.[Effect of maize variety and storage form on the development of the maize weevil, Sitophilus zeamais Motschulsky]Effect of maize variety and storage form on the development of the maize weevil, Sitophilus zeamais Motschulsky

Monthly plantings of three maize cultivars with differing resistance/susceptibility to maize streak geminivirus (MSV) and samplings of Cicadulina leafhopper vector were made from December 1988 to April 1990 in the humid forest and from May to November 1989 in the Guinea savanna zones of Nigeria. ...


Asanzi, M.Bosque Pérez, N.A.Buddenhagen, I.W.Gordon, D.Nault, L.[Interactions among maize steak virus disease leathopper vector populations and maize cultivars in forest and savanna zones of Nigeria]Interactions among maize steak virus disease leathopper vector populations and maize cultivars in forest and savanna zones of Nigeria

Maize streak virus (MSV) was first studied by Storey in Kenya in the 1920s and resistance transferred into East African maize in the 1960's. Yet the majority of farmers of East Africa are still growing streak-susceptible maize. At the International Institute of Tropical Agriculture (IITA) in Nige...


Buddenhagen, I.W.Bosque Pérez, N.A.[Historical overview of breeding for durable resistance to maize streak virus for tropical Africa]Historical overview of breeding for durable resistance to maize streak virus for tropical Africa

Life table studies of Mussidia nigrivenella Ragonot, a pest of maize in Benin, showed that host plant species had a significant effect on larval survival and developmental time. The maximum percentage of larvae surviving was recorded on jackbean, Canavalia ensiformis (36%) and lowest on maize (18...


Sétamou, M.Schulthess, F.Bosque Pérez, N.A.Poehling, H.M.Borgemeister, C.[Bionomics of Mussidia nigrivenella (Lepidoptera: Pyralidae) on three host plants]Bionomics of Mussidia nigrivenella (Lepidoptera: Pyralidae) on three host plants

The movement of Cicadulina storeyi China (Homoptera: Cicadellidae), vector of maize streak geminivirus, within maize (Zea mays L.) fields was studied using mark, release and recapture experiments. Cicadulina storeyi, marked with fluorescent dye, were released at dusk and monitored for 14 days usi...


Asanzi, C.M.Bosque Pérez, N.A.Nault, L.R.[Movement of Cicadulina storeyi [Homoptera:Cicadellidae] in maize fields and its behavior in relation to maize growth stage]Movement of Cicadulina storeyi [Homoptera:Cicadellidae] in maize fields and its behavior in relation to maize growth stage

Difficulties of identification of natural enemies of cereal stemborers for 'redistribution' in Africa are discussed. Tritrophic level studies on wild and cultivated habitats of borers and beneficial species are needed to judge the impact of a natural enemy species in the cropping system. Areas wi...


Schulthess, F.Bosque Pérez, N.A.Chabi-Olaye, A.Gounou, S.Ndemah, R.Goergen, Georg E.[Exchanging natural enemies species of lepidopterous cereal stemborers between African regions]Exchanging natural enemies species of lepidopterous cereal stemborers between African regions

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