Life history and life tables of western flower thrips, Frankliniella occidentalis (Thysanoptera: Thripidae) , on English cucumbers
Gaum, W.G.; Giliomee, JH.; Pringle, KL.
Bulletin of Entomological Research 84(2): 219-224
1994
ISSN/ISBN: 0007-4853 DOI: 10.1017/s0007485300039729Document Number: 531848
The life history of Frankliniella occidentalis was studied at 6 different temperatures on English cucumbers, cv. Pepinex. Life tables indicated that the highest population growth rate and net reproduction rate occurred at 30 degrees C, and the lowest at 15 degrees C where the population remained nearly stable. Generation time was the shortest at 30 degrees C and increased as temperature decreased. At 30 degrees C, oviposition increased, females matured and reproduced earlier and the time-specific fecundity was higher than at lower temperatures. Adult longevity was shortest at 30 degrees C and longest at 15 degrees C. The threshold value for development was calculated as 9.4 degrees C. The average duration of each development stage and the sex ratio at 6 different temperatures are given.