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Aphid infestation on eight potato cultivars (Solanum tuberosum L.) in Kenya

Published online by Cambridge University Press:  19 September 2011

J. H. Nderitu  and
J. M. Mueke
J. H. Nderitu
Affiliation:
National Agricultural Laboratories, P.O. Box 14733, Nairobi, Kenya
J. M. Mueke
Affiliation:
National Agricultural Laboratories, P.O. Box 14733, Nairobi, Kenya
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Abstract

Eight potato cultivars, viz, Anett, Desiree, Feldeslohn, Kerr's Pink, Kenya Baraka, Roslin Eburu, Roslin Gucha and Roslin Tana were tested in the field to compare their susceptibility to aphids. Despite the variation in results, Anett, Kerr's Pink and Desiree were identified as the most susceptible cultivars. The experiments revealed that Roslin Tana was a comparatively resistant cultivar useful for reference in further work.

There were no significant correlations between leaf area, glandular hairs and alate aphids with the number of apterae aphids on the eight potato cultivars. Resistance of Roslin Tana to aphids was, therefore, not due to the morphological characteristics of the cultivar, but probably to some physiological factor(s).

Résumé

Huit ‘cultivars’ de pommes de terre, à savoir, 1'‘Anett’, la ‘Désirée’, la ‘Feldeslohn,’ la ‘Kerr's Pink,’ la ‘Kenya Baraka,’ la ‘Roslin Eburu,’ la ‘Roslin Gucha,’ et la ‘Roslin Tana’ furent testeś sur le terrain pour comparer leurs prédispositions aux aphis. Malgré les différences en résultats, l'Anett, la Kerr's Pink et la Désirée ont été identifiées comme les ‘cultivars’ les plus prédisposés. Ces expériences ont révélé que la ‘Roslin Tana’ est relativement résistante, ce qui implique son utilité référentielle pour des travaux ultérieurs.

Il n'y avait pas de correlations importantes concernant l'aire de feuille, les poils glandulaires et les ‘aphis alates’ vis à vis le nombre d'‘apterae’ sur le huitième cultivar de pomme de terre. La résistance de la Roslin Tana aux aphis n'était, donc, pas due les caractères morphologiques des ‘cultivars’ mais probablement aux facteurs physiologiques.

Keywords

Resistancepotato cultivarsinfestationaphids
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 7 , Issue 5 , October 1986 , pp. 677 - 682
Copyright
Copyright © ICIPE 1986

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References

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