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Feasibility of the use of resistant cultivar in sweetpotato weevil control

Published online by Cambridge University Press:  19 September 2011

N. S. Talekar
N. S. Talekar
Affiliation:
Asian Vegetable Research and Development Center (AVRDC), P.O. Box 42, Shanhua, Tainan 74199, Taiwan, ROC
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Abstract

Despite considerable efforts in developing sweetpotato cultivare resistant to two species of sweetpotato weevils, Cylas formicarius and C. puncticollis, no cultivar has yet been bred, utilizing previously identified sources of resistance, and cultivated in any appreciable area for weevil control. Escape, nonpreference, tolerance, and antibiosis, and the possible mechanisms involved do not seem to exist in the sweetpotato plant or cannot be utilized because of the peculiarities of ecology and host plant relationship of the weevils. Since weevil infestation of roots does not adversely affect the growth and reproduction of sweetpotato plants, it is possible that weevil resistance to root infestation does not exist in this crop.

Résumé

Em dépit d'efforts considérables en vue de développer des variétés de patate douce résistantes aux deux espèces de charançon Cylas formicarius et C. puncticollis, aucune variété n'a été développée jusqu'à présent à partir de sources de résistance connues et qui soit actuellement cultivée sur une superficie appréciable. Les mécanismes par lesquels les plantes peuvent échapper, tolérer, ou résister aux attaques d'insectes ne semblent pas exister chez la patate douce, ou ne peuvent être utilisés en raison de certaines particularités écologiques et des relations ravageur plante hôte. Puisque l'infestation des racines par le charançon ne nuit pas à la croissance des parties aériennes et à la reproduction de la plante, il est possible qu'il n'existe pas de résistance à l'infestation racinaire chez la patate douce.

Keywords

Host plant resistanceCylas formicariusCylas puncticollisescapenonpreferencetoleranceantibiosissweetpotato
Type
Symposium X: Sweetpotato Weevil
Information
International Journal of Tropical Insect Science , Volume 8 , Issue 4-5-6: Recent Advances in Research on Tropical Entomology , December 1987 , pp. 815 - 817
Copyright
Copyright © ICIPE 1987

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