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Presence of water-soluble materials on cotton terminals as related to bollwoxm (Lepidoptera: Noctuidae) resistance

Published online by Cambridge University Press:  27 March 2009

H. L. Bhardwaj ,
J. B. Weaver  and
R. F. Severson
H. L. Bhardwaj
Affiliation:
Department of Agronomy, University of Georgia, Athens, Georgia 30602, U.S.A.
J. B. Weaver
Affiliation:
Department of Agronomy, University of Georgia, Athens, Georgia 30602, U.S.A.
R. F. Severson
Affiliation:
USDA-ARS, Russell Research Laboratory, Athens, Georgia 30605, U.S.A.
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Extract

Bollworms (Heliothis zea Boddie and H. virescens F.) are serious cotton pests. During 1980, the cotton crop in U.S.A. suffered an 8·73% loss due to insect pests; 3·07% of this loss was due to the damage caused by bollworms. This 8·73% loss in cotton production occurred despite control measures adopted by cotton growers at an average cost of $36.27 per acre (Anon. 1981). Four plant characteristics impart varying degrees of host-plant resistance against bollworms in cotton (Maxwell, 1977). The bollworm moths exhibit an oviposition nonpreference towards glabrous and nectarless cottons. Presence of high gossypol and ‘X-factors’ in plant parts detrimentally affects the growth and survival of bollworm larvae. The ‘X-factors’ are unknown chemical substances that impart host-plant resistance against bollworms in cotton. This resistance was shown to be heritable by Lukefahr et al. (1974).

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 109 , Issue 1 , August 1987 , pp. 193 - 195
Copyright
Copyright © Cambridge University Press 1987

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References

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