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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 2011-11

Autor: Rwegasira, G.M. Momanyi, G. Rey, M.E.C. Kahwa, G. Legg, J.P.

Cassava brown streak disease (CBSD) has been a problem in Tanzania since 1936. Existing literature indicated limited distribution of the disease to low altitudes, usually <100 m above sea level, but the current geographical distribution of the disease was not known. Whether a single or many strai...

Enlace original: https://cgspace.cgiar.org/handle/10568/88168

Investigación en Agricultura
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Rwegasira, G.M. ,  Momanyi, G. ,  Rey, M.E.C. ,  Kahwa, G. ,  Legg, J.P. ,  [Widespread occurrence and diversity of cassava brown streak virus (Potyviridae:Ipomovirus) in Tanzania] ,  Widespread occurrence and diversity of cassava brown streak virus (Potyviridae:Ipomovirus) in Tanzania
Journal Article 2019-06

Autor: Carvajal-Yepes, M. Cardwell, K. Nelson, A. Garrett, K.A. Giovani, B. Saunders, D.G.O. Kamoun, S. Legg, J.P. Verdier, Valérie Lessel, J. Neher, R.A. Day, R. Pardey, P. Gullino, M.L. Records, A.R. Bextine, B. Leach, J.E. Staiger, S. Tohme, Joseph M.

To satisfy a growing demand for food, global agricultural production must increase by 70% by 2050. However, pests and crop diseases put global food supplies at risk. Worldwide, yield losses caused by pests and diseases are estimated to average 21.5% in wheat, 30.0% in rice, 22.6% in maize, 17.2% ...

Enlace original: https://cgspace.cgiar.org/handle/10568/102422

Investigación en Agricultura
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Carvajal-Yepes, M. ,  Cardwell, K. ,  Nelson, A. ,  Garrett, K.A. ,  Giovani, B. ,  Saunders, D.G.O. ,  Kamoun, S. ,  Legg, J.P. ,  Verdier, Valérie ,  Lessel, J. ,  Neher, R.A. ,  Day, R. ,  Pardey, P. ,  Gullino, M.L. ,  Records, A.R. ,  Bextine, B. ,  Leach, J.E. ,  Staiger, S. ,  Tohme, Joseph M. ,  [A global surveillance system for crop diseases: global preparedness minimizes the risk to food supplies] ,  A global surveillance system for crop diseases: global preparedness minimizes the risk to food supplies
Journal Article 2017

Autor: Maruthi, M.N. Jeremiah, S.C. Mohammed, I.U. Legg, J.P.

Cassava brown streak disease (CBSD) is arguably the most dangerous current threat to cassava, which is Africa's most important food security crop. CBSD is caused by two RNA viruses: Cassava brown streak virus (CBSV) and Ugandan cassava brown streak virus (UCBSV). The roles of the whitefly Bemisia...

Enlace original: https://cgspace.cgiar.org/handle/10568/88009

Investigación en Agricultura
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Maruthi, M.N. ,  Jeremiah, S.C. ,  Mohammed, I.U. ,  Legg, J.P. ,  [The role of the whitefly, Bemisia tabaci (Gennadius), and farmer practices in the spread of cassava brown streak ipomoviruses] ,  The role of the whitefly, Bemisia tabaci (Gennadius), and farmer practices in the spread of cassava brown streak ipomoviruses
Journal Article 2013

Autor: Zinga, I. Chiroleu, F. Legg, J.P. Lefeuvre, P. Komba, E. Semballa, S. Yandia, S.P. Mandakombo, N. Reynaud, B. Lett, J.

Cassava is a vital crop in Africa and represents the main food crop in Central African Republic (CAR). CAR has recently faced large reductions in cassava yields that have led to a surge in market prices. To better understand the causes of the reduction in yield, we identified biotic constraints t...

Enlace original: https://cgspace.cgiar.org/handle/10568/76030

Investigación en Agricultura
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Zinga, I. ,  Chiroleu, F. ,  Legg, J.P. ,  Lefeuvre, P. ,  Komba, E. ,  Semballa, S. ,  Yandia, S.P. ,  Mandakombo, N. ,  Reynaud, B. ,  Lett, J. ,  [Epidemiological assessment of cassava mosaic disease in Central African Republic reveals the importance of mixed viral infection and poor health of plant cuttings] ,  Epidemiological assessment of cassava mosaic disease in Central African Republic reveals the importance of mixed viral infection and poor health of plant cuttings
Journal Article 2017-10

Autor: Szyniszewska, A.M. Busungu, C. Boni, S.B. Shirima, R. Bouwmeester, H.J. Legg, J.P.

To improve understanding of the dynamics of the cassava mosaic disease (CMD) pandemic front, geospatial approaches were applied to the analysis of 3 years’ data obtained from a 2-by-2° (approximately 222-by-222 km) area of northwestern Tanzania. In total, 80 farmers’ fields were assessed in each ...

Enlace original: https://cgspace.cgiar.org/handle/10568/87969

Investigación en Agricultura
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Szyniszewska, A.M. ,  Busungu, C. ,  Boni, S.B. ,  Shirima, R. ,  Bouwmeester, H.J. ,  Legg, J.P. ,  [Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania] ,  Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in Northwestern Tanzania
Journal Article 2017

Autor: Tembo, M. Mataa, M. Legg, J.P. Chikoti, Patrick Chiza Ntawuruhunga, Pheneas

Cassava is the main food crop for an estimated 30% of the population in Zambia where yields of 5.8 t/ha are some of the lowest of any major cassava-producing country. A study was conducted to characterize yield responses of Zambian cassava genotypes to cassava mosaic disease (CMD), as well as the...

Enlace original: https://cgspace.cgiar.org/handle/10568/89937

Investigación en Agricultura
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Tembo, M. ,  Mataa, M. ,  Legg, J.P. ,  Chikoti, Patrick Chiza ,  Ntawuruhunga, Pheneas ,  [Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia] ,  Cassava mosaic disease: incidence and yield performance of cassava cultivars in Zambia
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
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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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