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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
Enlace permanente
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 2018

Autor: Wosula, Everlyne N. Evans, G.A. Issa, K.A. Legg, J.P.
Enlace original: https://cgspace.cgiar.org/handle/10568/89955

Investigación en Agricultura
Enlace permanente
Wosula, Everlyne N. ,  Evans, G.A. ,  Issa, K.A. ,  Legg, J.P. ,  [Two new invasive whiteflies (Hemiptera: Aleyrodidae) to Tanzania] ,  Two new invasive whiteflies (Hemiptera: Aleyrodidae) to Tanzania
Journal Article 2014

Autor: Lapidot, M. Legg, J.P. Wintermantel, William M. Polston, J.E.

Whiteflies are a key pest of crops in open-field production throughout the tropics andsubtropics. This is due in large part to the long and diverse list of devastating plantviruses transmitted by these vectors. Open-field production provides many challengesto manage these viruses and in many case...

Enlace original: https://cgspace.cgiar.org/handle/10568/76099

Investigación en Agricultura
Enlace permanente
Lapidot, M. ,  Legg, J.P. ,  Wintermantel, William M. ,  Polston, J.E. ,  [Management of whitefly transmitted viruses in openfield production systems] ,  Management of whitefly transmitted viruses in openfield production systems
Journal Article 2014-10

Autor: Legg, J.P. Shirima, R.R. Tajebe, L. Guastella, D. Boniface, S. Jeremiah, S. Nsami, E. Chikoti, Patrick Chiza Rapisarda, C.

Cassava mosaic disease and cassava brown streak disease are caused by viruses transmitted by Bemisia tabaci and affect approximately half of all cassava plants in Africa, resulting in annual production losses of more than $US 1 billion. A historical and current bias towards virus rather than vect...

Enlace original: https://cgspace.cgiar.org/handle/10568/76098

Investigación en Agricultura
Enlace permanente
Legg, J.P. ,  Shirima, R.R. ,  Tajebe, L. ,  Guastella, D. ,  Boniface, S. ,  Jeremiah, S. ,  Nsami, E. ,  Chikoti, Patrick Chiza ,  Rapisarda, C. ,  [Biology and management of Bemisia whitefly vectors of cassava virus pandemics in Africa] ,  Biology and management of Bemisia whitefly vectors of cassava virus pandemics in Africa
Journal Article 2014

Autor: Guastella, D. Tajebe, L. Evans, G. Fovo, F. Rapisarda, C. Legg, J.P.

Two Asian whiteflies, Aleurotrachelus tuberculatus Singh 1933 and Aleuroclava psidii (Singh 1931), are recorded for the first time in Africa. Both species were found on Psidium guajava L. (Myrtaceae) in the Coast and Dar es Salaam regions of Tanzania. It is not possible to determine when these sp...

Enlace original: https://cgspace.cgiar.org/handle/10568/76101

Investigación en Agricultura
Enlace permanente
Guastella, D. ,  Tajebe, L. ,  Evans, G. ,  Fovo, F. ,  Rapisarda, C. ,  Legg, J.P. ,  [First record of Aleuroclava psidii (Singh) and Aleurotrachelus tuberculatus Singh (Hemiptera: Aleyrodidae) in East Africa] ,  First record of Aleuroclava psidii (Singh) and Aleurotrachelus tuberculatus Singh (Hemiptera: Aleyrodidae) in East Africa
Journal Article 2015-09-15

Autor: Tajebe, L. Boni, S.B. Guastella, D. Cavalieri, V. Lund, O. Rugumamu, C.P. Rapisarda, C. Legg, J.P.

Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae), one of the most economically important agricultural pests worldwide, is the vector of cassava mosaic geminiviruses that cause cassava mosaic disease (CMD). In East and Central Africa, a severe CMD pandemic that spread from Uganda in the late 19...

Enlace original: https://cgspace.cgiar.org/handle/10568/76354

Investigación en Agricultura
Enlace permanente
Tajebe, L. ,  Boni, S.B. ,  Guastella, D. ,  Cavalieri, V. ,  Lund, O. ,  Rugumamu, C.P. ,  Rapisarda, C. ,  Legg, J.P. ,  [Abundance, diversity and geographic distribution of cassava mosaic disease pandemic-associated Bemisia tabaci in Tanzania] ,  Abundance, diversity and geographic distribution of cassava mosaic disease pandemic-associated Bemisia tabaci in Tanzania
Journal Article 2017

Autor: Tocko-Marabena, B.K. Silla, S. Simiand, C. Zinga, I. Legg, J.P. Reynaud, B. Delatte, H.

After 2007, upsurges of whiteflies on cassava plants and high incidences of cassava diseases were observed in Central African Republic. This recent upsurge in the abundance of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) was directly linked to serious damage to cassava crops resulting from...

Enlace original: https://cgspace.cgiar.org/handle/10568/88055

Investigación en Agricultura
Enlace permanente

Tocko-Marabena, B.K. ,  Silla, S. ,  Simiand, C. ,  Zinga, I. ,  Legg, J.P. ,  Reynaud, B. ,  Delatte, H. ,  [Genetic diversity of Bemisia tabaci species colonizing cassava in Central African Republic characterized by analysis of cytochrome c oxidase subunit I] ,  Genetic diversity of Bemisia tabaci species colonizing cassava in Central African Republic characterized by analysis of cytochrome c oxidase subunit I
Journal Article 2016

Autor: Ndunguru, Joseph León, Leandro de Doyle, Catherine D. Sseruwagi, Peter Plata, German Legg, J.P. Thompson, Graham Tohme, Joseph M. Aveling, Theresa Ascencio Ibáñez, Jose T. Hanley Bowdoin, Linda

Cassava mosaic begomoviruses (CMBs) cause cassava mosaic disease (CMD) across Africa and the Indian subcontinent. Like all members of the geminivirus family, CMBs have small, circular single-stranded DNA genomes. We report here the discovery of two novel DNA sequences, designated SEGS-1 and SEGS-...

Cassava mosaic begomoviruses (CMBs) cause cassava mosaic disease (CMD) across Africa and the Indian subcontinent. Like all members of the geminivirus family, CMBs have small, circular single-stranded DNA genomes. We report here the discovery of two novel DNA sequences, designated SEGS-1 and SEGS-...

Enlace original: https://cgspace.cgiar.org/handle/10568/73456

Investigación en Agricultura
Enlace permanente
Ndunguru, Joseph ,  León, Leandro de ,  Doyle, Catherine D. ,  Sseruwagi, Peter ,  Plata, German ,  Legg, J.P. ,  Thompson, Graham ,  Tohme, Joseph M. ,  Aveling, Theresa ,  Ascencio Ibáñez, Jose T. ,  Hanley Bowdoin, Linda ,  [Two Novel DNAs that enhance symptoms and overcome CMD2 resistance to cassava mosaic disease] ,  Two Novel DNAs that enhance symptoms and overcome CMD2 resistance to cassava mosaic disease
Journal Article 2002

Autor: Legg, J.P. French, R. Rogan, D. Okao‐Okuja, G. Brown, J.

During the 1990s, an epidemic of cassava mosaic virus disease caused major losses to cassava production in Uganda. Two factors associated with the epidemic were the occurrence of a novel recombinant begomovirus, EACMV-Ug, and unusually high populations of the whitefly vector, Bemisia tabaci. Here...

Enlace original: https://cgspace.cgiar.org/handle/10568/92725

Investigación en Agricultura
CMD
Enlace permanente
Legg, J.P. ,  French, R. ,  Rogan, D. ,  Okao‐Okuja, G. ,  Brown, J. ,  [A distinct Bemisia tabaci (Gennadius) (Hemiptera: Sternorrhyncha: Aleyrodidae) genotype cluster is associated with the epidemic of severe cassava mosaic virus disease in Uganda] ,  A distinct Bemisia tabaci (Gennadius) (Hemiptera: Sternorrhyncha: Aleyrodidae) genotype cluster is associated with the epidemic of severe cassava mosaic virus disease in Uganda
Journal Article 1998

Autor: Legg, J.P. Ogwal, S.

Surveys of the incidence of African cassava mosaic disease (ACMD) and its whitefly vector, Bernisiu tabaci, were made at three-month intervals in 1992 and 1993 along two South-North transects. One was in central and the other in eastern Uganda. ACMD incidence was high within the northern localiti...

Enlace original: https://cgspace.cgiar.org/handle/10568/100991

Investigación en Agricultura
Enlace permanente
Legg, J.P. ,  Ogwal, S. ,  [Changes in the incidence of African cassava mosaic geminivirus and the abundance of its whitefly vector along southnorth transects in Uganda] ,  Changes in the incidence of African cassava mosaic geminivirus and the abundance of its whitefly vector along southnorth transects in Uganda

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