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Life tables for american bollworm, Heliothis armigera Hubner on four species of cotton under field conditions

Published online by Cambridge University Press:  19 September 2011

R. Nanthagopal  and
S. Uthamasamy
R. Nanthagopal
Affiliation:
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India
S. Uthamasamy
Affiliation:
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India
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Abstract

—Life table studies of American bollworm Heliothis armigera Hubner on four species of cotton revealed that maximum mortality in the population occurred early in the life cycle. Predation and dispersal accounted for maximum mortality of early instars, whereas migration and unknown reasons accounted for maximum mortality of late instars. Considering the life tables on four varieties of cotton, the loss of population during the first instar was significantly high in K8 and TKHe 44 whereas in Suvin and MCU 9 the loss was less.

Keywords

Life tablemortalitycohortsurvivorshippredationdispersal
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 10 , Issue 4 , August 1989 , pp. 521 - 530
Copyright
Copyright © ICIPE 1989

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