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Life history and life tables of western flower thrips, Frankliniella occidentalis (Thysanoptera: Thripidae), on English cucumbers

Published online by Cambridge University Press:  10 July 2009

Wilma G. Gaum ,
J. H. Giliomee  and
K. L. Pringle
Wilma G. Gaum*
Affiliation:
Department of Entomology and Nematology, University of Stellenbosch, Republic of South Africa
J. H. Giliomee
Affiliation:
Department of Entomology and Nematology, University of Stellenbosch, Republic of South Africa
K. L. Pringle
Affiliation:
Department of Entomology and Nematology, University of Stellenbosch, Republic of South Africa
*
Department of Entomology and Nematology, University of Stellenbosch, Stellenbosch, 7600, Republic of South Africa.
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Abstract

The life history of Frankliniella occidentalis (Pergande) was studied at six different temperatures on English cucumbers, cv. Pepinex. Life tables constructed indicate that the highest population growth rate (rm) and net reproduction rate (R0) occur at 30°C and the lowest at 15°C, where the population remains nearly stable. Generation time (T) was the shortest at 30°C and increased as temperature decreased. At 30°C oviposition increased, females matured and reproduced earlier and the time specific fecundity (mx) was higher than at lower temperatures. Adult longevity was shortest at 30°C and longest at 15°C. The threshold value for development was determined as 9.4°C. Average duration of each developmental stage and the sex ratio at six different temperatures are given.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 84 , Issue 2 , June 1994 , pp. 219 - 224
Copyright
Copyright © Cambridge University Press 1994

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