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Journal Article 2004-03

Autor: Sseruwagi, P. Sserubombwe, W.S. Legg, J.P. Ndunguru, J. Thresh, J.M.

Field surveys in many cassava growing areas of Africa have assessed the incidence and severity of cassava mosaic disease (CMD), populations of the whitefly vector (Bemisia tabaci), and the distribution of cassava mosaic begomoviruses (CMBs). The methods employed differ greatly between countries a...

Enlace original: https://cgspace.cgiar.org/handle/10568/96421

Investigación en Agricultura
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Sseruwagi, P. ,  Sserubombwe, W.S. ,  Legg, J.P. ,  Ndunguru, J. ,  Thresh, J.M. ,  [Methods of surveying the incidence and severity of cassava mosaic disease and whitefly vector populations on cassava in Africa: a review] ,  Methods of surveying the incidence and severity of cassava mosaic disease and whitefly vector populations on cassava in Africa: a review
Journal Article 2017

Autor: Shirima, R.R. Maeda, D.G Kanju, E. Ceasar, G. Tibazarwa, F.I. Legg, J.P.

Cassava brown streak disease (CBSD) is the most important virus disease of cassava and a major food security threat in Africa. Yearly economic losses of up to $100 million USD have been attributed to CBSD. The lack of information on plant-virus interactions has restricted progress in breeding for...

Enlace original: https://cgspace.cgiar.org/handle/10568/80816

Investigación en Agricultura
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Shirima, R.R. ,  Maeda, D.G ,  Kanju, E. ,  Ceasar, G. ,  Tibazarwa, F.I. ,  Legg, J.P. ,  [Absolute quantification of cassava brown streak virus mRNA by real-time qPCR] ,  Absolute quantification of cassava brown streak virus mRNA by real-time qPCR
Journal Article 2019-03-20

Autor: Ramcharan, A. McCloskey, P. Baranowski, K. Mbilinyi, N. Mrisho, L. Ndalahwa, M. Legg, J.P. Hughes, D.P.

Convolutional neural network (CNN) models have the potential to improve plant disease phenotyping where the standard approach is visual diagnostics requiring specialized training. In scenarios where a CNN is deployed on mobile devices, models are presented with new challenges due to lighting and ...

Enlace original: https://cgspace.cgiar.org/handle/10568/105535

Investigación en Agricultura
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Ramcharan, A. ,  McCloskey, P. ,  Baranowski, K. ,  Mbilinyi, N. ,  Mrisho, L. ,  Ndalahwa, M. ,  Legg, J.P. ,  Hughes, D.P. ,  [A mobile-based deep learning model for cassava disease diagnosis] ,  A mobile-based deep learning model for cassava disease diagnosis
Journal Article 1999

Autor: Legg, J.P.

During the 1990s, an epidemic of an unusually severe form of cassava mosaic virus disease (CMD) has expanded to cover virtually all of Uganda, and substantial areas in the neighbouring countries of Kenya, Tanzania, Sudan and the Democratic Republic of Congo. Losses in the generally sensitive loca...

Enlace original: https://cgspace.cgiar.org/handle/10568/96060

Investigación en Agricultura
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Legg, J.P. ,  [Emergence, spread and strategies for controlling the pandemic of cassava mosaic virus disease in east and central Africa] ,  Emergence, spread and strategies for controlling the pandemic of cassava mosaic virus disease in east and central Africa
Journal Article 2005-02

Autor: Otim, M. Legg, J.P. Kyamanywa, S. Polaszek, A. Gerling, D.

Bemisia tabaci Gennadius (Homoptera: Aleyrodidae) is the vector of cassava mosaic geminiviruses that cause cassava mosaic disease (CMD), which in turn causes devastating yield losses. Surveys were conducted from October 2000 to November 2001 in four agro-ecologies in Uganda to enhance the underst...

Enlace original: https://cgspace.cgiar.org/handle/10568/96520

Investigación en Agricultura
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Otim, M. ,  Legg, J.P. ,  Kyamanywa, S. ,  Polaszek, A. ,  Gerling, D. ,  [Occurrence and activity of Bemisia tabaci parasitoids on cassava in different agro-ecologies in Uganda] ,  Occurrence and activity of Bemisia tabaci parasitoids on cassava in different agro-ecologies in Uganda
Journal Article 2004

Autor: Okao‐Okuja, G. Legg, J.P. Traoré, L. Jorge, M.A.B.

A survey in Senegal and Guinea Conakry established the presence and incidence of cassava mosaic virus disease (CMD) in both countries. CMD occurred in all the fields surveyed, although its incidence was higher in Senegal (83%) than in Guinea (64%). Populations of the whitefly vector, Bemisia taba...

Enlace original: https://cgspace.cgiar.org/handle/10568/103317

Investigación en Agricultura
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Okao‐Okuja, G. ,  Legg, J.P. ,  Traoré, L. ,  Jorge, M.A.B. ,  [Viruses associated with cassava mosaic disease in Senegal and Guinea Conakry] ,  Viruses associated with cassava mosaic disease in Senegal and Guinea Conakry
Journal Article 2005

Autor: Sseruwagi, P. Legg, J.P. Maruthi, M. Colvin, J. Rey, M. Brown, J.

The extent of genetic variability and host-plant distribution of Bemisia tabaci (Gennadius) genotypes colonising cultivated and uncultivated plant species occurring adjacent to cassava fields in selected cassava-producing areas of Uganda in 2003/04 were investigated using the mitochondrial cytoch...

Enlace original: https://cgspace.cgiar.org/handle/10568/91885

Investigación en Agricultura
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Sseruwagi, P. ,  Legg, J.P. ,  Maruthi, M. ,  Colvin, J. ,  Rey, M. ,  Brown, J. ,  [Genetic diversity of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) populations and presence of the B biotype and a nonB biotype that can induce silverleaf symptoms in quash, in Uganda] ,  Genetic diversity of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) populations and presence of the B biotype and a nonB biotype that can induce silverleaf symptoms in quash, in Uganda
Journal Article 2005

Autor: Ndunguru, J. Legg, J.P. Aveling, T. Thompson, G. Fauquet, Claude M.

Cassava is infected by numerous geminiviruses in Africa and India that cause devastating losses to poor farmers. We here describe the molecular diversity of seven representative cassava mosaic geminiviruses (CMGs) infecting cassava from multiple locations in Tanzania. We report for the first time...

Enlace original: https://cgspace.cgiar.org/handle/10568/91814

Investigación en Agricultura
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Ndunguru, J. ,  Legg, J.P. ,  Aveling, T. ,  Thompson, G. ,  Fauquet, Claude M. ,  [Molecular biodiversity of cassava begomoviruses in Tanzania: evolution of cassava geminiviruses in Africa and evidence for East Africa being a center of diversity of cassava geminiviruses] ,  Molecular biodiversity of cassava begomoviruses in Tanzania: evolution of cassava geminiviruses in Africa and evidence for East Africa being a center of diversity of cassava geminiviruses
Journal Article 2006

Autor: Leke, W.N. Ramsell, J.N. Titanji, V.P. Legg, J.P. Brown, J. Ngeve, J. Njualem, D. Fondong, V.N. Kvarnheden, A.

Virus diseases present major constraints to production of okra (Abelmoschus esculentus) in Cameroon. However, the identity of these viruses had not been determined prior to this study. Detection of begomoviruses in okra using polymerase chain reaction (PCR) has been problematic because of interfe...

Les maladies associees aux virus constituent des contraintes majeures a la production du gombo (Abetmoschusescu/enlus) au Cameroun. Toutefois, l'identite de ces virus n'a jusqu'ici pas ete d6termin6e. La d6tection des begomoviruschez le gombo par R6action de Polymerisation en Chaine (RPC) s'avere...

Enlace original: https://cgspace.cgiar.org/handle/10568/91761

Investigación en Agricultura
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Leke, W.N. ,  Ramsell, J.N. ,  Titanji, V.P. ,  Legg, J.P. ,  Brown, J. ,  Ngeve, J. ,  Njualem, D. ,  Fondong, V.N. ,  Kvarnheden, A. ,  [Detection and identification of begomoviruses from landraces of okra (Abelmoschus esculentus) in Cameroon] ,  Detection and identification of begomoviruses from landraces of okra (Abelmoschus esculentus) in Cameroon
Journal Article 2006

Autor: Legg, J.P. Owor, B. Sseruwagi, P. Ndunguru, J.
Enlace original: https://cgspace.cgiar.org/handle/10568/91786

Investigación en Agricultura
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Legg, J.P. ,  Owor, B. ,  Sseruwagi, P. ,  Ndunguru, J. ,  [Cassava mosaic virus disease in East and Central Africa: epidemiology and management of a regional pandemic] ,  Cassava mosaic virus disease in East and Central Africa: epidemiology and management of a regional pandemic

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