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Tag Archives: Cylas puncticollis

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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  • Pages: 13

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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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  • Pages: 6

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Evaluation of bioassays for testing Bt sweetpotato events against sweetpotato weevils

Sweetpotato weevil (Cylas puncticollis) Boheman is a serious pest throughout Sub-Saharan Africa region and is a big threat to sweetpotato cultivation. Ten transgenic sweetpotato events expressing Cry7Aa1, Cry3Ca1, and ET33-34 proteins from Bacillus thuringiensis (Bt) were evaluated for resistance against C. puncticollis. Four bioassays used were: (i) 1st instar larva in an artificial …
  • Size: 122.6 kB
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  • Pages: 10

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Presentation: RNAi & resistance against African SP weevils

African sweetpotato weevil Cylas puncticollis and C. brunneus are listed among key damaging pests almost declining sweetpotato (SP) production. Numerous advances have been made develop resistant SP varieties with limited success. This presentation describes the RNAi technology for insect control and protection to beneficial insects against pathogenic viruses, the work …
  • Size: 2.5 MB
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  • Pages: 30

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Presentation: RNAi & resistance against African SP weevils

African sweetpotato weevil Cylas puncticollis and C. brunneus are listed among key damaging pests almost declining sweetpotato (SP) production. Numerous advances have been made develop resistant SP varieties with limited success. This presentation describes the RNAi technology for insect control and protection to beneficial insects against pathogenic viruses, the work …
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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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  • Pages: 1

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Release of Two Orange-fleshed Sweetpotato Cultivars, ‘SPK004’ (‘Kakamega’) and ‘Ejumula’, in Uganda

Two orange-fleshed landrace sweetpotato cultivars: ‘SPK004’ (‘Kakamega’) and ‘Ejumula’ were approved for release by the Ugandan Plant Variety Release Committee in Apr. 2004. This is the third lot of sweetpotato cultivars to be officially released by the sweetpotato program in Uganda, the first two being released in 1995 and 1999. ‘Ejumula’ …
  • Size: 43.7 kB
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Incidence, abundance and damage by the sweet potato butterfly (Acraea acerata Hew. and the African sweet potato weevils (Cylas spp.) across an altitude gradient in Kabale district, Uganda

It is increasingly becoming important to understand relationships between temperature (manifested at different altitude levels) and sweet potato insect pest characteristics in light of temperature changes as a result of global warming. Field surveys were conducted in Kabale district of Uganda along an altitude gradient to study the effects of …
  • Size: 347.3 kB
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  • Pages: 11

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