Sweetpotato weevil (Cylas spp.) resistance in African sweetpotato germplasm

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dc.contributor.authorMuyinza, Harriet
dc.contributor.authorTalwana, Herbert L.
dc.contributor.authorMwanga, Robert O.M.
dc.contributor.authorStevenson, Philip C.
dc.date.accessioned2022-06-01T05:50:51Z
dc.date.available2022-06-01T05:50:51Z
dc.date.issued2012
dc.description.abstractHost-plant resistance could be a useful tool for managing the weevils Cylas puncticollis and C. brunneus, which are major insect pests of sweetpotato in Africa. There is currently little information on existing resistance mechanisms against Cylas spp. in African cultivars, except where lower levels of weevil damage were attributed to escape due to deep rooting and reduced soil cracking, limiting the exposure of roots to weevils. Here, we evaluate weevil resistance in 134 sweetpotato cultivars and landraces over two seasons in two agroecologically diverse locations. Several sweetpotato cultivars, including New Kawogo, expressed resistance to Cylas spp. The resistance characteristics have been demonstrated in previous laboratory experiments to be quantifiable and thus potentially useful in targeted plant-breeding against Cylas spp. We showed external root and stem base damage to be an accurate quantitative indicator of internal root damage, offering rapid and accurate evaluation of resistance in field trials for screening. Moreover, weevil resistance can be assessed earlier in plant development, so saving time in the selection of the progeny from breeding programmes.en_US
dc.identifier.citationMuyinza, H., Talwana, H. L., Mwanga, R. O., & Stevenson, P. C. (2012). Sweetpotato weevil (Cylas spp.) resistance in African sweetpotato germplasm. International Journal of Pest Management, 58(1), 73-81. http://dx.doi.org/10.1080/09670874.2012.655701en_US
dc.identifier.urihttp://dx.doi.org/10.1080/09670874.2012.655701
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/3642
dc.language.isoenen_US
dc.publisherInternational Journal of Pest Managementen_US
dc.subjectCylas brunneusen_US
dc.subjectCylas puncticollisen_US
dc.subjectHost-plant resistanceen_US
dc.subjectSweetpotato breedingen_US
dc.subjectRoot damageen_US
dc.titleSweetpotato weevil (Cylas spp.) resistance in African sweetpotato germplasmen_US
dc.typeArticleen_US
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