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ADULT LONGEVITY, FECUNDITY, AND POPULATION GROWTH RATES FOR TRIALEURODES RICINI MISRA (HOMOPTERA: ALEYRODIDAE) AT DIFFERENT CONSTANT TEMPERATURES

Published online by Cambridge University Press:  31 May 2012

P. Shishehbor  and
P.A. Brennan
P. Shishehbor
Affiliation:
Department of Environmental Resource Management, University College Dublin, Belfield, Dublin 4, Ireland
P.A. Brennan
Affiliation:
Department of Environmental Resource Management, University College Dublin, Belfield, Dublin 4, Ireland
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Abstract

Longevity and reproductive potential of adult males and females of Trialeurodes ricini Misra were determined under laboratory conditions at four constant temperatures (20, 25, 30, and 35 ± 1°C). The resulting data were used to calculate life tables and rates of increase at each temperature. Females of T. ricini oviposited means of 183, 224, 294, and 132 eggs at 20, 25, 30, and 35°C, respectively, and had a mean longevity of 38.52, 28.15, 15.78, and 10.11 days at the same four temperatures. The net reproductive rate was 49.92, 72.26, 111.08, and 38.44, and the daily intrinsic rate of increase was 0,05, 0.11, 0.18, and 0.15 at 20, 25, 30, and 35 °C, respectively. Generation times decreased from 69.88 to 24.92 days with increasing temperature. The results indicate that T. ricini can, in otherwise unlimited conditions, persist and increase in numbers within the range 20–35°C.

Résumé

L’effet de températures choisies (20, 25, 30 et 35 ± 1°C) sur la longévité et la fécondité de Trialeurodes ricini Misra a été étudié en laboratoire en utilisant le ricin, Ricinus communis L., comme plant-hôte. L’aleurode vit en moyenne 38,52, 28,15, 15,78 et 10,11 jours et pond 183, 224, 294 et 132 oeufs à 20, 25, 30 et 35°C respectivement. La durée de la période d’oviposition diminue et le nombre d’oeufs pondus augmente avec la temperature. A 20, 25, 30 et 35 °C, les taux intrinsèques de croissance sont de 0,05, 0,11, 0,18 et 0,15 par jour. Les taux nets de reproduction sont de 49,92, 72,26, 111,08 et 38,44 et les intervalles moyens de génération sont de 69,88, 38,69, 25,05 et 24,92 jours respectivement.

Type
Articles
Information
The Canadian Entomologist , Volume 128 , Issue 5 , October 1996 , pp. 859 - 863
Copyright
Copyright © Entomological Society of Canada 1996

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