Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz (1999) 72, 45-48

C. Sengonca and B. Liu (1999)
Laboratory studies on the effect of temperature and humidity on the life table of the whitefly, Aleurotuberculatus takahashi David and Subramaniam (Hom., Aleyrodidae) from southeastern China
Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz 72 (2), 45-48
Abstract: The present paper deals with developmental duration, emergence, longevity and fecundity of Aleurotuberculatus takahashi David and Subramaniam at different temperatures and humidity levels. The developmental time from egg to adult was 81.8, 56.9, 39.6, 29.9, 20.6 days at 15 ± 1,20 ±1,25 ± 1, 30 ± 1, 35 ± 1°C under constant relative. humidity (RH) of 70 ± 5%, respectively. At 25 ± 1°C, the total developmental time was slightly affected by humidity, ranging from 46.4 days at 40 ± 5% RH to 39.2 days at 90 ± 5% RH. The developmental threshold and the thermal constant for the stage from egg to adult were 10.1°C and 542.8 day-degrees. It was estimated that the whitefly has about 10 generations a year in Fuzhou region in southeastern China. Lowest mortality rates of 12.4% for the egg, 6.8% for the nymph and 3.1% for the puparium were obtained at 15 ± 1°C, while they were highest with 92.1%, for the egg, 48.2% for the nymph and 36.3% for the puparium at 35 ± 1°C. The mortality rates were slightly affected by humidity, ranging from 17.6% at 40 ± 5% RH to 27.9% at 90 ± 5% RH for the egg, 11.2% at 40 ± 5% RH to 19.6% at 90 ± 5% RH for the nymph, and 6.4% at 40 ± 5% RH to 11.6% at 90 ± 5% RH for the puparium. The emergence rate of adults decreased as temperature increased, ranging from 89.1% at 15 ± 1°C to 21.5% at 35 ± 1°C, so did the longevity of adults, ranging from 9.6 days at 15 ± 1°C to 2.9 days at 35 ± 1°C. The number of eggs per female was significantly affected by temperature (P.01), valuing 29.4 eggs per female at 15 ± 1°C, 36.7 at 20 ± 1°C, 52.4 at 25 ± 1°C, 42.9 at 30 ± 1°C, and 6.1 at 35 ± 1°C. The optimal temperature for reproduction was about 25°C.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Cetin Sengonca

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aleurotuberculatus takahashi		China (south)