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Cotton insect resistance studies in the Western cotton growing area of Tanzania

Published online by Cambridge University Press:  19 September 2011

Brigitte T. Nyambo
Brigitte T. Nyambo
Affiliation:
Tanzania Agricultural Research Institute, Ukiriguru, P.O. Box 1433, Mwanza, Tanzania
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Abstract

The American bollworm, Heliothis armigera Hüb. is the major cotton pest in Tanzania. The commercial cotton varieties have the ability to compensate for early loss of fruiting points caused either by physiological stress or by bollworm damage; and therefore early sowing, together with a blanket spraying regime, is recommended to minimize the damage caused by this bollworm. To extend this integrated approach, studies to incorporate Heliothis -resistant characters, viz. frego bract, nectariless, high gossypol and glandless into the Ukiriguru cotton varities, were started in the early 1970s and are still in progress. To date, frego bract has given consistently good results; and intensive work is under way.

Résumé

Heliothis armigera (Hübner) est le ravageur majeur du coton en Tanzanie. Les variétés commerciales du coton ont la capacité à compenser les pertes hâtives d'organes fructifères due à, ou la tension physiologique ou le dégat de la chenille et par consequent un semis hâtif en association avec un régime generale de pulvérisation est recommendée, afin de reduire le dégât. Afin de prolonger cette approche intégrée des études ont été commencer au débût des années 1970 par s'introduir des caractères résistantes, ‘viz.’, bractée Frago, ‘nectariless’, une forte teneur en ‘gossypol’ et ‘glandless’ dans des variétés de Ukiriguru et settes etudes sont encore en progrès. A ce jour bractée Frago a permis d'obtenir conséquemment des résultats bons et du travail intensif est réalisée.

Keywords

JassidsHeliothis armigeracotton insect resistancewestern cotton growing area in TanzaniaJassidesHeliothis armigerala résistance au ravageur du cotonla région ouest du Coton en Tanzanie
Type
Section IV: Plant breeding for insect resistance
Information
International Journal of Tropical Insect Science , Volume 6 , Special Issue 3: Host Plant Resistance and its Significance in Pest Management , June 1985 , pp. 379 - 384
Copyright
Copyright © ICIPE 1985

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References

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