Books and Book Chapters: Recent submissions

Now showing items 301-320 of 977

    • Evaluation methods for drought tolerance of cowpeas 

      Watanabe, I.; Hakoyama, S.; Terao, T.; Singh, B.B. (1997)
      Cowpea (Vigna unguiculata [L.| Wulp.) is primarily grown in dry regions in the tropics, particularly in sub-Saharan Africa. Drought is important among several yield-reducing factors. Nine hundred cowpea accessions from the Genetic Resources Unit of IITA were evaluated for drought tolerance in a field during the dry season at the IITA Kano Station in northern Nigeria. Some of them were retested three times in greenhouses, once in Nigeria and twice in Japan, using seedlings planted in small pots ...

    • Micropropagation of Brassica oleracea (Cole crops) 

      Msikita, W.; Skirvin, R.M.; Chen, S.Y. (1997)
      Brassica oleracea, (family Brassicaceae), also referred to as cole crops (Nieuwhof 1969; Yamaguchi 1983; Nonnecke 1989), is an economically important vegetable species composed mostly of biennially herbaceous plants, grown as annuals or biennials, depending on the part harvested. Practically every part of the plant can be used, including leaves (cabbage, kale), axillary buds (Brussels sprouts), stems (kohlrabi), flower buds (broccoli), and floral primordia (cauliflower). It is a highly polymorphic ...

    • Production costs in the yambased cropping systems of southeastern Nigeria: RCMP research monograph, No. 6 

      Nweke, F.; Ugwu, B.; Asadu, C.; Ay, P. (1991)

    • IITAs role in International improvement of grain legumes 

      Goldsworthy, P.R. (1978)

    • Evaluating options for soil organic carbon maintenance under intensive cropping in the West African savanna using the Rothamsted Carbon (RothC) model 

      Diels, J.; Aihou, K.; Iwuafor, E.; Merckx, R.; Vanlauwe, Bernard (2003)

    • Genetic improvement for the sustainable management of resistance 

      Craenen, K.; Ortiz, R. (2003)
      In the 1990s, innovative cross-breeding and classic genetic analysis of segregation ratios allowed advances in the understanding of host plant response to black leaf streak disease. Partial resistance owing to a recessive major gene (bs1 ) coupled with at least two additive minor genes (bsri ) appears to be durable because this genetic system slows disease development in the host plant. As a consequence, resistant hybrids show more healthy leaves, i.e. greater photosynthetic leaf area, than their ...

    • Underresearched tropical food crops: cowpea, banana and plantain, and yams 

      Asiedu, Robert; Fatokun, C.A.; Mignouna, J.H.; Ng, S.Y.C.; Quin, F.M.; Vuylsteke, D.R. (1999)
      For a mixture of reasons certain tropical crops which are important as primary or secondary food staples are relatively underresearched. The modem tools of molecular and cellular biotechnology offer the opportunity not only to make substantial gains in our knowledge of these crops, but also to overcome some of the obstacles which presently restrain both their genetic improvement and their productivity in tropical farming Systems. The crops considered here, cowpea (Vigna unguiculatd), banana and ...

    • Bridging the gap with the CGIAR systemwide program on integrated pest management. 

      James, B.; Neuenschwander, P.; Markham, R.; Anderson, P.; Braun, A.; Overholt, W.; Khan, Z.; Makkouk, K.; Meredia, K.; Dokono, D.; Mota-Sanchez, D.; Emechebe, A. (2003)

    • Maize revolution in West and Central Africa: an overview 

      Fakorede, M.A.; Badu-Apraku, B.; Kamara, A.Y.; Menkir, A.; Ajala, S.O. (2003)
      Maize (Zea mays L.) is cultivated under a broad range of climatic conditions in West and Central Africa (WCA). Unfortunately, maize production is constrained by a host of abiotic and biotic stresses, including drought, low soil fertility, diseases, insect pests, and the parasitic weed Striga hermonthica. The stresses, which occur in all countries of WCA, are too formidable for individual national research programs to overcome. The West and Central Africa Collaborative Maize Research Network (WECAMAN) ...

    • The impact of IARC genetic improvement programmes on cassava 

      Johnson, N.L.; Manyong, Victor M.; Dixon, Alfred G.O.; Pachico, D. (2003)

    • Nematode parasites of bananas and plantains 

      Sikora, R.A.; Coyne, D.L.; Queneherve, P. (CAB International, 2018)

    • Reflections and challenges: nematology in subtropical and tropical agriculture 

      Sikora, R.A.; Coyne, D.L.; Hallmann, J.; Timper, P. (CAB International, 2018)

    • Plant parasitic nematodes in subtropical and tropical agriculture 

      Sikora, R.A.; Coyne, D.L.; Hallmann, J.; Timper, P. (CAB International, 2018-08)

    • Consevation des sols: utilization des banquettes a double courbure: Guide de recherche de lIita, No. 6 

      Couper, D.C. (1993)
      L'activite agricole rend les terres cultivees sensible a l'erosion. Or cette demiere peut les render improductives. Les banquettes de niveau contribuent a la prevention de la plus spectaculaire des forms d' erosion. L' erosion en ravines. Le present fascicule fait etat du leve de plan et de la construction de banquettes a double courbur.

    • Croisement manuel du niebe: Guide de recherche de lIita, No. 42 

      Myers, G.O. (1993)
      En matiere d'ameliotation genetique du nie-be, il est rare de trouver un plant ou une variete posse-dant taus les caracteres desires. La tecombinaison des catacteres desires, II partir de sources parentales dis-tinctes, s'obtient en croisant les plants et en effectuant les pollinisations croisees necessaires. L'objet du pre-sent fascicule est de presenter une methode de pollini-sation croisee du niebe mise au point A.

    • Le nonlabour dans les tropiques humides et subhumides dAfrique: Guide de recherche de lIita, No. 3 

      Couper, D.C. (1993)
      Les sols tropicaux sont generalement peu fer-tiles, physiquement fragiles et facilement erodes en l'absence de tapis vegetal. Le labour est pratique dans les tropiques simplement pour lutter contre les adven-tices, mais il contribue it I'erosion acceleree des sols, etant donne qu'un sol cultive est sans protection. L'ero-sion en ravines peut etre rninimisee au moyen de ban-quettes de niveau. L'erosion en nappe peut etre reduite au moyen de la lutte chimique contre les adventices, etant donne que ...

    • Les cicadelles et le virus de la striure du mais (MSV): Guide de recherche de lIita, No. 38 

      Mesfin, T.; Bosque-Pérez, N.A. (1993)
      Apres Ie groupe des pu ce rons , c'est Ie groupe des cicadelles qui cornporte Ie plus grand n ornbr e de vecteurs de virus. Les especes de Cicadulina se rencon• trent da ns les regions tropicales et chaudes du rnonde; elles sont, pour la plupart, d'origine africaine. Le virus de la Stl iure du rnals (MSY), t ra n s rnis par Cica• dulina, est une irnportante con t rainte il la production de rna ls en Afrique. II est facile de cornbattre la striure en pl antant des varietes resistantes il cette ...

    • Presentation visuelle des resultats de recherche: Guide de recherche de lIita, No. 45 

      Zachmann, R.; Siri, C. (1993)
      Des supports visue!s bien elabores vous ai-dent iI mieux communiquer les resultats de vos re-cherches et donnent plus d-impact iI votre expose. Vos recherches seront mieux appreciees. Les supports de mauvaise qualite peuvent avoir une incidence negative meme sur les meilleurs messages. Vous pouvez gacher un expose suite iI la presentation de supports visuels mal prepares, ou iI une mauvaise presentation des sup-ports. Le present document contient un resume des recomman-dations sur la maniere de ...

    • La securite en station de recherche agronomique: Guide de recherche de lIita, No. 44 

      Austin, P.D. (1993)
      II est d ifficile d'assurer la securite en station de recherche; Loutefois, la securite revet une importance toute speciale du fait de la perte des resuJtats de la reo che rche consecutive aux vols de cultures experimen• tales, de materiel et de donnees. Le bUl de la securite esl de proteger les vies el les proprietes. Les fonds con sa• crcs II la securile peuvenl passer pour de l"argenl gas• pille; neanmoins, un seul incidenl peul couter plus que l"ensemble des investissements lies il la securile. ...

    • A review of research on resource management systems of Cameroons forest zone: foundations and new horizons: RCMP Research monograph, No. 14 

      Russell, D. (1993)