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Tag Archives: Cyclas brunneus

SASHA Brief 2015: Weevil resistance through biotechnology

This flyer summarizes the objectives, achievements and plans of CIP’s work to address the problem of weevils through development of weevil resistant sweetpotato varieties through breeding and biotechnology. It outlines the Bt-RNAi combined gene technology being applied, and the progress made between 2014 and 2015 towards achieving the project objectives.
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Presentation: Weevil resistance in sweetpotato using biotechnology

This presentation is described by the attached abstract Marc Ghislain1a, Lydia Wamalwa1a, Sandra Manrique1b, Jan Kreuze1b, Runyararo Rukarwa1c Robert Mwanga1c, Maria Soto-Aguilar2, Katterinne Prentice3, Olivier Christiaens3, Ine Pertry3, Godelieve Gheysen3, Guy Smagghe3   1 International Potato center, a Nairobi Kenya, b Lima Peru. C Namulonge Uganda 2 Donald Danforth Plant …
  • Size: 347.4 kB
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Pest Status of Acraea acerata Hew. and Cylas spp. in Sweetpotato (Ipomoea batatas (L.) Lam.) and Incidence of Natural Enemies in the Lake Albert Crescent Agro-ecological Zone of Uganda

This study presents the results of farmers’ field surveys of the sweetpotato butterfly, Acraea acerata Hew., and the two African sweetpotato weevils, Cylas puncticollis Boheman and C. brunneus F. infestation and damage. The objectives of this study were to determine (i) occurrence and distribution of A. acerata and Cylas spp. as well as infestation …
  • Size: 754.1 kB
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Weevil Resistant Sweetpotato through Biotechnology

African sweetpotato weevils (SPW), Cylas puncticollis and C. brunneus, are a major threat to sweetpotato, which plays a vital role in food security and income generation for both the urban and rural poor in Sub-Saharan Africa (SSA). SPW can devastate sweetpotato production, including total crop loss. A socio-economic study undertaken …
  • Size: 124.8 kB
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Enhancing sweetpotato resistance to African weevils (Cylas puncticollis and Cylas brunneus) through transgenic breeding

Sweetpotato production is greatly constrained by two weevil species; Cylas puncticollis and C. brunneus that cause yield losses of up to 80%. The use of resistant sweetpotato cultivars is the most sustainable strategy to control the weevils. However, little success has been realized in developing resistant cultivars. Genetic engineering is …
  • Size: 24.4 kB
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  • Pages: 5

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