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The weed seed bank under seven fallow tree species was analysed in size and composition five years after tree establishment. The seed bank was lower in Enterolobium cyclocarpum fallows than in the other tree fallows at both 0-5 and 5-10 cm depths. Nuclea latifolia and Terminalia superba tree fall...


Kamara, A.Y.Chikoye, D.Jutzi, S.C.[Differences in weed seed banks in planted tree fallows in southwestern Nigeria]Differences in weed seed banks in planted tree fallows in southwestern Nigeria

Multilocational characterization of selected herbaceous and shrub legumes was carried out over a 3-yr period at lowland and midlatitude sites in the moist savanna agroecological zone in Nigeria where a south-north gradient exists for rainfall, length of growing season, and insolation. One study s...


Ekeleme, F.Akobundu, I.O.Fadayomi, R.O.Chikoye, D.Abayomi, Y.A.[Characterization of legume cover crops for weed suppression in the moist savanna of Nigeria]Characterization of legume cover crops for weed suppression in the moist savanna of Nigeria

Several insects, pathogens and weeds are serious constraints upon cassava production in West Africa. The International Institute of Tropical Agriculture and agricultural research institutions from Benin, Cameroon, Ghana, and Nigeria initiated the Ecologically Sustainable Cassava Plant Protection ...


Chikoye, D.Ekeleme, F.Ambe, J.T.[Survey of distribution and farmer perceptions of speargrass Imperata cylindrica in cassava based cropping systems in West Africa]Survey of distribution and farmer perceptions of speargrass Imperata cylindrica in cassava based cropping systems in West Africa

The influence of weeds on maize intercropped with cassava was evaluated in three fallow management systems and four cropping frequencies from 1989 to 1996 in lbadan, Nigeria, West Africa. Fallow management systems consisted of natural bush, Leucaena leucocephala hedgerows and Puerctria phaseoloid...


Akobundu, I.O.Ekeleme, F.Chikoye, D.[Influence of fallow management systems and frequency of cropping on weed growth and crop yield]Influence of fallow management systems and frequency of cropping on weed growth and crop yield

A survey of weeds and weeding practices was carried out by a team of agricultural economists and agronomists on 283 farms in 5 cassava-growing regions of Colombia at 3 times during a cropping season. From 71-78 percent of the weed species present were broad- leaved species. As cassava grew older,...


Doll, J.Pinstrup-Andersen, PerDíaz, R.O.[An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia]An agro-economic survey of the weeds and weeding practices in cassava (Manihot esculenta Crantz) in Colombia

The effects of tropical weeds on the yield of while yam were studied outdoors in wooden boxes. When the foliage and roots of weeds were in physical contact with the crop until harvest (full interference), tuber yield of yam was reduced by 76–79% of that obtained under weed‐free conditions over 3 ...


Unamma, R.P.Akobundu, I.[Effects of tropical weeds on yield in white yam (Dioscorea rotundata Poir)]Effects of tropical weeds on yield in white yam (Dioscorea rotundata Poir)

Water hyacinth,Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae) was first reported in Bénin in 1977 and about 10 years later became the major floating water weed in the south east, obstructing boat traffic and fisheries. Water hyacinth multiplies in permanently fresh water in the swa...


Thielen, R.Ajuonu, O.Schade, V.Neuenschwander, P.Adite, A.Lomer, C.[Importation, releases, and establishment of Neochetina spp. (col., curculionidae) for the biological control of water hyacinth, Eichhomia crassipes CLil., Pontederiaceae), Benin, West Africa]Importation, releases, and establishment of Neochetina spp. (col., curculionidae) for the biological control of water hyacinth, Eichhomia crassipes CLil., Pontederiaceae), Benin, West Africa

Field trials were conducted in 1999 and 2000 in the northern Guinea savanna of Nigeria to evaluate the potential of several weed management practices to reduce early weed competition in maize. The treatments were different combinations of the herbicide mixture metolachlor + atrazine at 5 L ha−1, ...


Chikoye, D.Schulz, S.Ekeleme, F.[Evaluation of integrated weed management practices in maize in northern Nigeria]Evaluation of integrated weed management practices in maize in northern Nigeria

Planted fallows are an alternative to the unsustainable bush fallow for improved soil and weed management in the tropics. However, the interactive effects of planted fallows and tillage on the weed seedbank are not well documented in the tropical environment. The effect of fallow type and tillage...


Ekeleme, F.Chikoye, D.Akobundu, I.O.[Weed seedbank response to planted fallow and tillage in southwest Nigeria]Weed seedbank response to planted fallow and tillage in southwest Nigeria

Recent information on the biological balance between purple nutsedge (Cyperus rotundus) and cassava is analyzed; the possibilities of influencing this balance to favor cassava are also studied. The slow initial growth of cassava highly favors the development and propagation of C. rotundus, result...


Leihner, D.E.Holguin V., J.López M., J.[El coquito (Cyperus rotundus L.) en el cultivo de yuca: Interacciones y control]El coquito (Cyperus rotundus L.) en el cultivo de yuca: Interacciones y control

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