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The relationship between stem base and root damage by Cylas spp. on sweetpotato

The relationship between stem base and root damage by Cylas spp. on sweetpotato

Muyinza, Harriet, Stevenson, Philip C. ORCID: 0000-0002-0736-3619, Mwanga, Robert O.M., Talwana, Herbert, Murumu, J. and Odongo, B. (2007) The relationship between stem base and root damage by Cylas spp. on sweetpotato. African Crop Science Conference Proceedings, 8. pp. 955-957. ISSN 1023-070X

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The Sweetpotato weevils Cylas puncticollis Boheman and C. brunneus Fabricius are the most prevalent pests of sweetpotato in Africa. There was need to develop techniques for quick germplasm categorization for resistance to the weevil. This study aimed at identification of the
relationship between levels of weevil damage on stem bases and root damage by the Cylas weevil. A total of 130 varieties were planted at the National Semi-arid resources Research Institute in Uganda in 2 seasons in a RBD. Plots were composed of 15 plants 30cm apart in 3 replicates. Artificial weevil infestation of plots to augment field weevil population was done at 90, 120 and 240 days after planting (DAP). Plants were harvested at 7 MAP. The mean
external and internal damage of the stems damage and % root damage of the plants were investigated. Data was analysis using MSTATIC Statistical package. There was a high
positive correlation between internal and external stem base damage values and levels of sweetpotato root damage by C. brunneus and C. puncticollis weevils. Using the stem base
damage indicator technique to categorise resistance in sweetpotato could enable quicker selection of sweetpotato varieties with relative resistance to weevils.

Item Type: Article
Additional Information: [1] Paper presented at the 8th African Crop Science Society 2007 Conference - 'Crop research, technology dissemination and adoption to increase food supply, reducing hunger and poverty in Africa,' held 27-31 October 2007, at Suzan Mubarak Center for Arts and Letters, Minia University, El Minia, Egypt. [2] Full-text of this paper is available (included in African Crop Science proceedings, October 2007, volume 8) at given Official URL - scroll down to 'Crop Protection' and then to 'The relationship between stem base and root damage.' [3] Abstracts for all papers are also available at the Official URL - scroll to 'Abstracts Book' and then to 'Program, Abstracts of Papers, List of Participants.'
Uncontrolled Keywords: Sweetpotato weevil, Cylas puncticollis Boheman, C. brunneus Fabricius, sweetpotato, stem base damage, root damage, resistance
Subjects: S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
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Last Modified: 11 Nov 2011 12:06

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