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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Population dynamics of Bemisia tabaci (Homoptera: Aleyrodidae) parasitoids on cassava mosaic disease-resistant and susceptible varieties
Biocontrol Science and Technology, Volume 16, No. 2, Year 2006
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Description
Three field trials were conducted at Namulonge Agricultural and Animal Production Research Institute to investigate the population dynamics of Bemisia tabaci Gennadius and its associated aphelinid parasitoids in Uganda. Results showed that more whitefly occurred on the cassava mosaic disease-resistant variety, (Nase 4) compared to the susceptible variety, (Ebwanatereka). Two species of aphelinid parasitoids, Eretmocerus mundus Mercet and Encarsia sophia Girault and Dodd, were identified during the study. Overall percent parasitism did not differ significantly (P >0.05) between varieties in all the trials, but significant differences occurred at 13, 15 and 21 weeks after planting during late season (2000), 18 weeks after planting during early season (2001), and 8 weeks after planting during late season (2001). The trends in the build up in numbers of both parasitoids species and apparent parasitism were similar, differed significantly on certain dates. It was, however, noted that percent parasitism decreased with nymph number. The significance of this phenomenon on the potential use of these aphelinid parasitoids as biocontrol agents of the cassava whitefly is discussed. © 2006 Taylor & Francis.
Authors & Co-Authors
Otim, Michael Hillary
Uganda, Kampala
Makerere University
Legg, James P.
Uganda, Kampala
International Institute of Tropical Agriculture Uganda
United Kingdom, Chatham
Natural Resources International
Kyamanywa, Samuel
Uganda, Kampala
Makerere University
Polaszek, Andrew D.
United Kingdom, London
The Natural History Museum, London
Gerling, Dan
Israel, Tel Aviv-yafo
Tel Aviv University
Statistics
Citations: 27
Authors: 5
Affiliations: 5
Identifiers
Doi:
10.1080/09583150500335558
ISSN:
09583157
e-ISSN:
13600478
Study Design
Cross Sectional Study
Study Locations
Uganda