Journal of Insect Science (2008) 8 (4), p. 52 (Xie et al.)

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Ming Xie, Yan-Hua Chen and Fang-Hao Wan (2008)
Responses of two whitefly species, Trialeurodes vaporariorum (Westwood) and Bemisia tabaci (Gennadius) B-biotype, to low temperatures
Journal of Insect Science 8 (4), 52-52
in P. A. Stansly and C.L. McKenzie, organizers: Fourth International Bemisia Workshop - International Whitefly Genomics Workshop, December 3-8, 2006, Duck Key, Florida, USA
Abstract: Two alien whitefly species, Trialeurodes vaporariorum (Westwood) and Bemisia tabaci (Gennadius) B-biotype, coexist in different geographic areas in China. The population density of B. tabaci B-biotype has been growing since the mid 1990s. The responses of both whitefly species to low temperatures were evaluated to clarify the interspecific differentiation in adaptation. The results showed that the cold-tolerant ability of all developmental stages of T. vaporariorum was much greater than that of B. tabaci B-biotype when they were exposed at 2°C for a series of time durations, 1-12d. Acclimation could significantly influenced cold tolerance of two whitefly species. When acclimated at 5°C for 48 h, the survival of T. vaporariorum was 78% at −8°C for 10 h, much higher than that of B. tabaci B -biotype. The optimal temperature range for T. vaporariorum development was lower than that for B. tabaci B-biotype. The developmental duration from egg to adult B. tabaci B-biotype was 1.5 times longer than T. vaporariorum when they were reared at 18° and 15°C, respectively. However, the development of B. tabaci B-biotype was faster than T. vaporariorum when the temperature was above 24°C. Our results indicated that the tolerant ability of T. vaporariorum to lower temperature was greater than B. tabaci B-biotype, which might facilitate the development of T. vaporariorum populations in the cool season, thus affecting the distributions of the two whitefly species.
Database assignments for author(s): Fang Hao Wan

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Bemisia tabaci biotype MEAM1
Trialeurodes vaporariorum