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Journal Article 2011

Autor: Bah, E.S. Bamkefa, B.A. Winter, S. Dixon, Alfred G.O.

Several begomovirus species and strains causing cassava mosaic disease (CMD) have been reported from cassava in Africa. A diagnostic survey was made in the four agroecological zones of Guinea to determine the status of CMD and cassava begomoviruses and to ascertain if the virulent Ugandan variant...

Enlace original: https://cgspace.cgiar.org/handle/10568/88177

Investigación en Agricultura
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Bah, E.S. ,  Bamkefa, B.A. ,  Winter, S. ,  Dixon, Alfred G.O. ,  [Distribution and current status of cassava mosaic disease and begomoviruses in Guinea] ,  Distribution and current status of cassava mosaic disease and begomoviruses in Guinea
Journal Article 2011

Autor: Bamkefa, B.A. Bah, E.S. Dixon, Alfred G.O.

A survey was carried out of 86 cassava fields in the lowland savanna; humid forest, mid-altitude savanna, and lowland humid savanna agroecological zones of Guinea. Each field was assessed for the incidence and severity of cassava bacterial blight (CBB), cassava anthracnose disease (CAD), Cercospo...

Enlace original: https://cgspace.cgiar.org/handle/10568/88138

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Bamkefa, B.A. ,  Bah, E.S. ,  Dixon, Alfred G.O. ,  [Survey of the current distribution and status of bacterial blight and fungal diseases of cassava in Guinea] ,  Survey of the current distribution and status of bacterial blight and fungal diseases of cassava in Guinea
Journal Article 2005-07

Autor: Onyeka, T.J. Dixon, Alfred G.O. Ekpo, E.J.A.

eports of cassava root rot disease from different African countries have increased in recent times. Field studies were conducted from July 1998 to October 1999 to determine a reproducible disease assessment method that would allow the comparison of results from different locations and an evaluati...

Enlace original: https://cgspace.cgiar.org/handle/10568/103515

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Onyeka, T.J. ,  Dixon, Alfred G.O. ,  Ekpo, E.J.A. ,  [Field evaluation of root rot disease and relationship between disease severity and yield in cassava] ,  Field evaluation of root rot disease and relationship between disease severity and yield in cassava
Journal Article 2007

Autor: Alabi, O.J. Ogbe, F.O. Bandyopadhyay, Ranajit Dixon, Alfred G.O. Hughes, J. Naidu, R.A.

Cassava mosaic disease (CMD) in Africa is caused by six distinct cassava mosaic viruses (family eminiviridae, genus Begomovirus). Among them, African cassava mosaic virus (ACMV) and East African cassava mosaicCameroon virus (EACMCV) have been reported in CMD-infected cassava plants in Nigeria. Ba...

Enlace original: https://cgspace.cgiar.org/handle/10568/92184

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Alabi, O.J. ,  Ogbe, F.O. ,  Bandyopadhyay, Ranajit ,  Dixon, Alfred G.O. ,  Hughes, J. ,  Naidu, R.A. ,  [The occurrence of African cassava mosaic virus and East African cassava mosaic Cameroon virus in natural hosts other than cassava in Nigeria] ,  The occurrence of African cassava mosaic virus and East African cassava mosaic Cameroon virus in natural hosts other than cassava in Nigeria
Journal Article 2006

Autor: Lokko, Y. Dixon, Alfred G.O. Offei, S.K. Danquah, E.Y.

The cassava mosaic virus disease (CMD) is the most important disease o1'cassava in Africa, causing severe economic losses. The genetic stock, clone 58308, has been extensively used in breeding for resistance to the disease, but recently, other sources o1'resistance to the disease have been identi...

Enlace original: https://cgspace.cgiar.org/handle/10568/91386

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Lokko, Y. ,  Dixon, Alfred G.O. ,  Offei, S.K. ,  Danquah, E.Y. ,  [Gene complementarity of resistance to the cassava mosaic disease among African cassava accessions] ,  Gene complementarity of resistance to the cassava mosaic disease among African cassava accessions
Journal Article 2006

Autor: Lokko, Y. Dixon, Alfred G.O. Offei, S. Danquah, E.Y.

A North Carolina design II experiment, with three improved cassava (Mctnihot esculenta Crantz) accessions as the female parents, l5 cassava landraces and three improved cassava accessions as the male parents (3 x I 8), was evaluated in three environments in Nigeria to determine the mode of gene a...

Enlace original: https://cgspace.cgiar.org/handle/10568/91387

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Lokko, Y. ,  Dixon, Alfred G.O. ,  Offei, S. ,  Danquah, E.Y. ,  [Combining ability analysis of resistance to mosaic virus disease in cassava] ,  Combining ability analysis of resistance to mosaic virus disease in cassava
Journal Article 2008

Autor: Onyeka, T.J. Owolade, O.F. Ogunjobi, A.A. Dixon, Alfred G.O. Okechukwu, R.U. Bamkefa, B.

Geo-referenced surveys were conducted in 2001 and 2003 to assess the prevalence and severity of cassava bacterial blight (CBB) and cassava anthracnose disease (CAD) in different agro-ecological zones of Nigeria. A total of 132 fields were visited in 2001 as follow: humid forest (HF) 42, derived s...

Enlace original: https://cgspace.cgiar.org/handle/10568/90883

Investigación en Agricultura
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Onyeka, T.J. ,  Owolade, O.F. ,  Ogunjobi, A.A. ,  Dixon, Alfred G.O. ,  Okechukwu, R.U. ,  Bamkefa, B. ,  [Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria] ,  Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria
Journal Article 2007

Autor: Ssemakula, G.N. Dixon, Alfred G.O. Maziya-Dixon, B.B.

The effects of genotype (G), environment (E), and G x E interaction on carotenoid concentration and yield of 25 yellow-fleshed (YF) and three white-fleshed (WF) cassava genotypes were investigated at five locations in Nigeria for two consecutive cropping seasons. The locations represented the maj...

Enlace original: https://cgspace.cgiar.org/handle/10568/92568

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Ssemakula, G.N. ,  Dixon, Alfred G.O. ,  Maziya-Dixon, B.B. ,  [Stability of total carotenoid concentration and fresh yield of selected yellow-fleshed cassava (Manihot esculenta Crantz)] ,  Stability of total carotenoid concentration and fresh yield of selected yellow-fleshed cassava (Manihot esculenta Crantz)
Journal Article 2008

Autor: Okechukwu, R.U. Dixon, Alfred G.O. Akoroda, M.O. Mwangi, M. Bandyopadhyay, Ranajit

In 2004 and 2005 through field trials in over 2500 locations in several agroecological zones, 40 new cassava varieties were introduced in Nigeria. The trials were managed by scientists, extension workers and farmers. The aim in introducing these new varieties was to pre-emptively manage cassava m...

Enlace original: https://cgspace.cgiar.org/handle/10568/90898

Investigación en Agricultura
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Okechukwu, R.U. ,  Dixon, Alfred G.O. ,  Akoroda, M.O. ,  Mwangi, M. ,  Bandyopadhyay, Ranajit ,  [Root rot resistance in new cassava varieties introduced to farmers in Nigeria] ,  Root rot resistance in new cassava varieties introduced to farmers in Nigeria
Journal Article 2008

Autor: Dixon, Alfred G.O. Ssemakula, G.N.

Cassava is an appropriate commodity to feature in Africa’s future economic development. As the crop rapidly changes from a basic foodstuff to a source of income and employment for rural populations, there is a parallel need to increase productivity, marketing opportunities and profitability. This...

Enlace original: https://cgspace.cgiar.org/handle/10568/90887

Investigación en Agricultura
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Dixon, Alfred G.O. ,  Ssemakula, G.N. ,  [Prospects for cassava breeding in subSaharan Africa in the next decade] ,  Prospects for cassava breeding in subSaharan Africa in the next decade

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