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The cowpea breeding programmes are reviewed and achievements at two major centres of cowpea research, i.e. IITA (Nigeria) and IARI (India), are summarized. Earlyand extra early genotypes are always photoperiod-insensitive, medium maturity varieties could be sensitive or neutral today length, whil...


Singh, B.B.Sharma, B.[Restructuring cowpea for higher yield]Restructuring cowpea for higher yield
Adda, C.Borgemeister, C.Meikle, W.G.Markham, R.H.Olaleye, I.Abdou, K.S.Zakari, M.O.[First record of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae), in the Republic of Niger]First record of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae), in the Republic of Niger

The accidental introduction of the lager grain borer, Prostephanus truncates, in the early 1980s result in destructive pest outbreaks in small-farm maize stores in both East and West Africa. Studies comparing the situation in rural maize stores in Costa Rica (in the pest's neotropical area of ori...


Markham, R.Borgemeister, C.Meikle, W.[Can biological control resolve the larger grai borer crisis?]Can biological control resolve the larger grai borer crisis?

Success of seed development following sexual crosses is primarily dependent on proper endosperm function and development. The failure to produce triploids, or “triploid block” in 4x×2x crosses served as the impetus for numerous studies of embryo and endosperm to attempt to explain cross failure. ...


Ehlenfeldt, M.K.Ortiz, R.[Evidence on the nature and origins of endosperm dosage requirements in Solanum and other angiosperm genera]Evidence on the nature and origins of endosperm dosage requirements in Solanum and other angiosperm genera
Everett, L.Eta-Ndu, J.T.Ndioro, M.Walker, P.[Combining ability among source populations for tropical midaltitude maize inbreds]Combining ability among source populations for tropical midaltitude maize inbreds

. A distributed-delay, demographic simulation model of Prostephanus tnmcatus (Horn) populations in rural maize (Zea mays L.) stores was developed and validated. Developmental and mortality parameters for eggs, larvae, and pupae, and the life span and fecundity data for adult insects, were estimat...


Meikle, W.G.Holst, N.Scholz, D.Markham, R.H.[Simulation model of Prostephanus truncatus (Coleoptera: Bostrichidae) in rural maize stores in the Republic of Benin]Simulation model of Prostephanus truncatus (Coleoptera: Bostrichidae) in rural maize stores in the Republic of Benin

An international project to assess the extent of aflatoxin contamination of maize in West Africa has begun in Nigeria. A survey was conducted from October 1992 to July 1993 to identify maize storage systems used by farmers in five major agro-ecological zones in Nigeria and the problem associated ...


Udoh, J.Ikotun, T.Cardwell, K.[Storage systems for maize ( Zea mays L.) in Nigeria from five agroecological zones]Storage systems for maize ( Zea mays L.) in Nigeria from five agroecological zones

The severity and increase of the Imperata cylindrica constraint as a weed, the decline of the traditional fallow systems as a means of soil fertility management and the lack of inorganic fertilizer appear to have created opportunities for adoption of mucuna (Mucuna pruriens) technology by smallho...


Sanginga, N.Ibewiro, B.Houngnandan, P.Vanlauwe, BernardOkogun, J.A.Akobundu, I.O.Versteeg, M.[Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa]Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa

The spatial distribution of five lepidopterous pests, Sesamia calamistis Hampson (Noctuidae), Eldana saccharina Walker (Pyralidae), Spodoptera exempta (Walker) (Noctuidae), Mussidia nigrivenella (Ragonot) (Pyralidae), and Cryptophlebia leucotreta (Meyrick) (Tortricidae), on maize in West Africa i...


Schulthess, F.Bosque Pérez, N.A.Gounou, S.[Sampling lepidopterous pests on maize in West Africa]Sampling lepidopterous pests on maize in West Africa

Exploratory survey have identified many constraints to maize production in the South Shaba region of Zaїre. These include maize streak disease, stalk bearing catapillars, low soil fertility, weed infestations, and irregular end-of- season rainfall. There is also a shortage of labour for land prep...


Vogel, W.O.Berhe, T.Hennessey, R.D.[Onfarm trials comparing the local streakdisease susceptible maize with a streakdisease resistant variety in southeastern Zaire]Onfarm trials comparing the local streakdisease susceptible maize with a streakdisease resistant variety in southeastern Zaire

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