James P. Legg

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Publications of James P. Legg (51 listed):

Insects (2020) 11 (1 - 58)
Beatrice C. Misaka, Everlyne N. Wosula, Philip W. Marchelo-d'Ragga, Trine Hvoslef-Eide and James P. Legg (2020)
Genetic diversity of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) colonizing sweet potato and cassava in South Sudan

Plant Disease (2019) 103, 2652-2664
Rudolph R. Shirima, Daniel G. Maeda, Edward E. Kanju, Silver Tumwegamire, Gloria Ceasar, Edda Mushi, Caroline Sichalwe, Kiddo Mtunda, Geoffrey Mkamilo and James P. Legg (2019)
Assessing the degeneration of cassava under high-virus inoculum conditions in coastal Tanzania

Phytopathology (2017) 107, 1123-1135
S. Thomas-Sharma, J. Andrade-Piedra, M. Carvajal Yepes, J.F. Hernandez Nopsa, M.J. Jeger, R.A.C. Jones, P. Kromann, J.P. Legg, J. Yuen, G.A. Forbes and K.A. Garrett (2017)
A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively propagated crops

Journal of Economic Entomology (2017) 110, 884-892
Simon B. Boni, Costancia P. Rugumamu, Dan Gerling, K. Sagary Nokoe and James P. Legg (2017)
Interactions between cassava mosaic geminiviruses and their vector, Bemisia tabaci (Hemiptera: Aleyrodidae)

Journal of Phytopathology (2017) 165, 707-717
Midatharahally N. Maruthi, Simon C. Jeremiah, Ibrahim U. Mohammed and James P. Legg (2017)
The role of the whitefly, Bemisia tabaci (Gennadius), and farmer practices in the spread of cassava brown streak ipomoviruses

PLoS ONE (2017) 12 (8 - e0182749)
Brice Kette Tocko-Marabena, Semballa Silla, Christophe Simiand, Innocent Zinga, James Legg, Bernard Reynaud and Helene Delatte (2017)
Genetic diversity of Bemisia tabaci species colonizing cassava in Central African Republic characterized by analysis of cytochrome c oxidase subunit I

Phytopathology (2017) 107, 1229-1242
A.M. Szyniszewska, C. Busungu, S.B. Boni, R. Shirima, H. Bouwmeester and J.P. Legg (2017)
Spatial analysis of temporal changes in the pandemic of severe cassava mosaic disease in northwestern Tanzania

Plant Disease (2016) 100, 1379-1387
Rabson M. Mulenga, James P. Legg, Joseph Ndunguru, Douglas W. Miano, Eunice W. Mutitu, Patrick C. Chikoti and O.J. Alabi (2016)
Survey, molecular detection, and characterization of geminiviruses associated with cassava mosaic disease in Zambia

Plant Disease (2016) 100, 1388-1396
I.L. Ndyetabula, S.M. Merumba, S.C. Jeremiah, S. Kasele, G.S. Mkamilo, F.M. Kagimbo and J.P. Legg (2016)
Analysis of interactions between cassava brown streak disease symptom types facilitates the determination of varietal responses and yield losses

Journal of General Virology (2015) 96, 956-968
Basavaprabhu L. Patil, James P. Legg, Edward Kanju and Claude M. Fauquet (2015)
Cassava brown streak disease: a threat to food security in Africa

Phytopathology (2015) 105, 646-655
S.C. Jeremiah, I.L. Ndyetabula, G.S. Mkamilo, S. Haji, M.M. Muhanna, C. Chuwa, S. Kasele, H. Bouwmeester, J.N. Ijumba and J.P. Legg (2015)
The dynamics and environmental influence on interactions between cassava brown streak disease and the whitefly, Bemisia tabaci

Journal of Applied Entomology (2015) 139, 627-637
L.S. Tajebe, S.B. Boni, D. Guastella, V. Cavalieri, O.S. Lund, C.P. Rugumamu, C. Rapisarda and J.P. Legg (2015)
Abundance, diversity and geographic distribution of cassava mosaic disease pandemic-associated Bemisia tabaci in Tanzania

Plant Disease (2015) 99, p. 1290 (Mulenga et al.)
R.M. Mulenga, D.W. Miano, P.C. Chikoti, J. Ndunguru, J.P. Legg and O.J. Alabi (2015)
First report of East African cassava mosaic Malawi virus in plants affected by cassava mosaic disease in Zambia

Pest Management Science (2015) 71, 383-394
Devid Guastella, Hermence Lulah, Lensa S. Tajebe, Vincenzo Cavalieri, Gregory A. Evans, Paolo A. Pedata, Carmelo Rapisarda and James P. Legg (2015)
Survey on whiteflies and their parasitoids in cassava mosaic pandemic areas of Tanzania using morphological and molecular techniques

Annals of Applied Biology (2015) 166, 297-310
L.S. Tajebe, D. Guastella, V. Cavalieri, S.E. Kelly, M.S. Hunter, O.S. Lund, J.P. Legg and C. Rapisarda (2015)
Diversity of symbiotic bacteria associated with Bemisia tabaci (Homoptera: Aleyrodidae) in cassava mosaic disease pandemic areas of Tanzania

Journal of Phytopathology (2015) 163, 433-443
Willard Mbewe, P. Lava Kumar, Wisdom Changadeya, Pheneas Ntawuruhunga and James Legg (2015)
Diversity, distribution and effects on cassava cultivars of Cassava brown streak viruses in Malawi

Pest Management Science (2014) 70, 1446-1453
James P. Legg, Rudolph Shirima, Lensa S. Tajebe, Devid Guastella, Simon Boniface, Simon Jeremiah, Elibariki Nsami, Patrick Chikoti and Carmelo Rapisarda (2014)
Biology and management of Bemisia whitefly vectors of cassava virus pandemics in Africa

Phytopathology (2011) 101, 1159-1167
G.M. Rwegasira, G. Momanyi, M.E.C. Rey, G. Kahwa and J.P. Legg (2011)
Widespread occurrence and diversity of Cassava brown streak virus (Potyviridae: Ipomovirus) in Tanzania

Plant Pathology (2009) 58, p. 402 (Lava Kumar et al.)
P. Lava Kumar, S.A. Akinbade, A.G.O. Dixon, N.M. Mahungu, M.P. Mutunda, D. Kiala, L. Londa and J.P. Legg (2009)
First report of the occurrence of East African cassava mosaic virus-Uganda (EACMV-UG) in Angola

Journal of Insect Science (2008) 8 (4), 27-28
James P. Legg, Peter Asiimwe, Peter Sseruwagi and Judith K. Brown (2008)
Changes in the biology of Bemisia tabaci on cassava in Africa and their impact on virus disease pandemics
in P. A. Stansly and C.L. McKenzie, organizers: Fourth International Bemisia Workshop - International Whitefly Genomics Workshop, December 3-8, 2006, Duck Key, Florida, USA

Journal of Insect Science (2008) 8 (4), p. 6 (Asiimwe et al.)
Peter Asiimwe, Justin Ecaat, Michael Otim, Dan Gerling, Moshe Guershon, Samuel Kyamanywa and James P. Legg (2008)
Mortality factors affecting populations of Bemisia tabaci on cassava in Uganda
in P. A. Stansly and C.L. McKenzie, organizers: Fourth International Bemisia Workshop - International Whitefly Genomics Workshop, December 3-8, 2006, Duck Key, Florida, USA

International Journal of Tropical Insect Science (2008) 28, 158-167
M. Otim, G. Kyalo, S. Kyamanywa, P. Asiimwe, J.P. Legg, M. Guershon and D. Gerling (2008)
Parasitism of Bemisia tabaci (Homoptera: Aleyrodidae) by Eretmocerus mundus (Hymenoptera: Aphelinidae) on cassava

Journal of Insect Science (2008) 8 (4), 25-26
Samuel Kyamanywa, Peter Asiimwe, Michael Otim, Dan Gerling and James P. Legg (2008)
Within plant distribution of Bemisia tabaci and its principal parasitoids on cassava mosaic disease (CMD) resistant and susceptible varieties
in P. A. Stansly and C.L. McKenzie, organizers: Fourth International Bemisia Workshop - International Whitefly Genomics Workshop, December 3-8, 2006, Duck Key, Florida, USA

Journal of Insect Science (2008) 8 (4), p. 42 (Rowley et al.)
Daniel P. Rowley, Peter Asiimwe, James P. Legg and Matthew H. Greenstone (2008)
Arthropod predation on Bemisia tabaci on cassava in Uganda: Preliminary results from molecular gut analysis
in P. A. Stansly and C.L. McKenzie, organizers: Fourth International Bemisia Workshop - International Whitefly Genomics Workshop, December 3-8, 2006, Duck Key, Florida, USA

Entomologia Experimentalis et Applicata (2007) 122, 37-44
P. Asiimwe, J.S. Ecaat, M. Otim, D. Gerling, S. Kyamanywa and J.P. Legg (2007)
Life-table analysis of mortality factors affecting populations of Bemisia tabaci on cassava in Uganda

Journal of Applied Entomology (2007) 131, 76-80
P. Asiimwe, J.S. Ecaat, M. Guershon, S. Kyamanywa, D. Gerling and J.P. Legg (2007)
Evaluation of Serangium n. sp. (Col., Coccinellidae), a predator of Bemisia tabaci (Hom., Aleyrodidae) on cassava

African Crop Science Journal (2007) 15, 1-9
P. Ntawuruhunga, G. Okao-Okuja, A. Bembe, M. Obambi, J.C. Armand Mvila and J.P. Legg (2007)
Incidence and severity of cassava mosaic disease in the Republic of Congo

Annals of Applied Biology (2006) 149, 137-144
S.O. Mallowa, D.K. Isutsa, A.W. Kamau, R. Obonyo and J.P. Legg (2006)
Current characteristics of cassava mosaic disease in postepidemic areas increase the range of possible management options

Biocontrol Science and Technology (2006) 16, 205-214
M. Otim, J. Legg, S. Kyamanywa, A. Polaszek and D. Gerling (2006)
Population dynamics of Bemisia tabaci (Homoptera: Aleyrodidae) parasitoids on cassava mosaic disease-resistant and susceptible varieties

Plant Pathology (2006) 55, 2-10
J. Ndunguru, J.P. Legg, I.B.F. Fofana, T.A.S. Aveling, G. Thompson and C.M. Fauquet (2006)
Identification of a defective molecule derived from DNA-A of the bipartite begomovirus of East African cassava mosaic virus

Entomologia Experimentalis et Applicata (2006) 119, 145-153
P. Sseruwagi, M.N. Maruthi, J. Colvin, M.E.C. Rey, J.K. Brown and J.P. Legg (2006)
Colonization of non-cassava plant species by cassava whiteflies (Bemisia tabaci) in Uganda

Virology Journal (2005) 2 (21) - Molecular biodiversity of ...
J. Ndunguru, J.P. Legg, T.A.S. Aveling, G. Thompson and C.M. Fauquet (2005)
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

Annals of Applied Biology (2005) 147, 253-265
P. Sseruwagi, J.P. Legg, M.N. Maruthi, J. Colvin, M.E.C. Rey and J.K. Brown (2005)
Genetic diversity of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) populations and presence of the B biotype and a non-B biotype that can induce silverleaf symptoms in squash, in Uganda

International Journal of Pest Management (2005) 51, 17-23
P. Sseruwagi, G. Okao-Okuja, A. Kalyebi, S. Muyango, V. Aggarwal and James P. Legg (2005)
Cassava mosaic geminiviruses associated with cassava mosaic disease in Rwanda

Plant Molecular Biology (2004) 56, 585-599
J.P. Legg and C.M. Fauquet (2004)
Cassava mosaic geminiviruses in Africa

Journal of Phytopathology (2004) 152, 69-76
G. Okao-Okuja, J.P. Legg, L. Traore and M. Alexandra Jorge (2004)
Viruses associated with cassava mosaic disease in Senegal and Guinea Conakry

Plant Pathology (2004) 53, p. 231 (Bigirimana et al.)
S. Bigirimana, P. Barumbanze, R. Obonyo and J.P. Legg (2004)
First evidence for the spread of East African cassava mosaic virus- Uganda (EACMV-UG) and the pandemic of severe cassava mosaic disease to Burundi

Plant Pathology (2004) 53, p. 232 (Legg et al.)
J.P. Legg, F. Ndjelassili and G. Okao-Okuja (2004)
First report of cassava mosaic disease and cassava mosaic geminiviruses in Gabon

Journal of Phytopathology (2004) 152, 243-249
B. Owor, J.P. Legg, G. Okao-Okuja, R. Obonyo, S. Kyamanywa and M.W. Ogenga-Latigo (2004)
Field studies of cross protection with cassava mosaic geminiviruses in Uganda

Annals of Applied Biology (2004) 145, 113-121
P. Sseruwagi, M.E.C. Rey, J.K. Brown and J.P. Legg (2004)
The cassava mosaic geminiviruses occurring in Uganda following the 1990s epidemic of severe cassava mosaic disease

Annals of Applied Biology (2004) 145, 331-337
B. Owor, J.P. Legg, G. Okao-Okuja, R. Obonyo and M.W. Ogenga-Latigo (2004)
The effect of cassava mosaic geminiviruses on symptom severity, growth and root yield of a cassava mosaic virus disease-susceptible cultivar in Uganda

Plant Pathology (2002) 51, p. 385 (Neuenschwander et al.)
P. Neuenschwander, J. d'A. Hughes, F. Ogbe, J.M. Ngatse and J.P. Legg (2002)
Occurrence of the Uganda variant of East African cassava mosaic virus (EACMV-Ug) in western Democratic Republic of Congo and the Congo Republic defines the westernmost extent of the CMD pandemic in East/Central Africa

Molecular Ecology (2002) 11, 1219-1229
J.P. Legg, R. French, D. Rogan, G. Okao-Okuja and J.K. Brown (2002)
A distinct Bemisia tabaci (Gennadius) (Hemiptera: Sternorrhyncha: Aleyrodidae) genotype cluster is associated with the epidemic of severe cassava mosaic virus disease in Uganda

Annals of Applied Biology (2001) 139, 37-43
J. Kubiriba, J.P. Legg, W. Tushemereirwe and E. Adipala (2001)
Vector transmission of Banana streak virus in the screenhouse in Uganda

Annals of Applied Biology (2001) 139, 31-36
J. Kubiriba, J.P. Legg, W. Tushemereirwe and E. Adipala (2001)
Disease spread patterns of Banana streak virus in farmers' fields in Uganda

Plant Pathology (2001) 50, p. 796 (Legg et al.)
J.P. Legg, G. Okao-Okuja, R. Mayala and J.-B. Muhinyuza (2001)
Spread into Rwanda of the severe cassava mosaic virus disease pandemic and the associated Uganda variant of East African cassava mosaic virus (EACMV-Ug)

Plant Pathology (1999) 48, 655-661
V. Aritua, J.P. Legg, N.E.J.M. Smit and R.W. Gibson (1999)
Effect of local inoculum on the spread of sweet potato virus disease: limited infection of susceptible cultivars following widespread cultivation of a resistant sweet potato cultivar

International Journal of Pest Management (1998) 44, 17-23
J.P. Legg and M.D. Raya (1998)
Survey of cassava virus disease in Tanzania

Journal of Applied Entomology - Zeitschrift für angewandte Entomologie (1998) 122, 169-178
J.P. Legg and S. Ogwal (1998)
Changes in the incidence of African cassava mosaic virus disease and the abundance of its whitefly Vector along south-north transects in Uganda

Annals of Applied Biology (1996) 128, 479-490
R.W. Gibson, J.P. Legg and G.W. Otim-Nape (1996)
Unusually severe symptoms are a characteristic of the current epidemic of mosaic virus disease of cassava in Uganda

Bulletin of Entomological Research (1993) 83, 395-403
J.P. Legg and A. Togola (1993)
Practical assessment of pearl millet (Pennisetum glaucum) crop loss caused by grasshopper pest (Orthoptera: Acrididae)-a major outbreak in north-west Mali