Environmental Entomology (2008) 37, 16-28

G.K. Mironidis and M. Savopoulou-Soultani (2008)
Development, survivorship, and reproduction of Helicoverpa armigera (Lepidoptera: Noctuidae) under constant and alternating temperatures
Environmental Entomology 37 (1), 16-28
Abstract: Laboratory studies were conducted to assess the effect of temperature on the survival, development, fecundity, and longevity of Helicoverpa armigera (Hübner) at 11 constant temperatures ranging from 12.5 to 40°C, as well as at five alternating temperature regimes (25-10, 30-15, 32.5-17.5, 35-20, and 35-27.5°C) and under a photoperiod of 16:8 (L:D) h. H. armigera reared at constant temperatures did not develop from egg to adult (emergence) outside the temperature range of 17.5-32.5°C. The alternating conditions expanded this range from 10 to 35°C. The lowest developmental thresholds of the immature stages were estimated by a linear model and ranged from 10.17 (pupal stage) to 11.95°C (egg stage) at constant temperature regimes and from 1.1 to 5.5°C, respectively at alternating temperatures. The values of developmental thresholds estimated using the nonlinear (Lactin-2) model were lower than those estimated by the linear model for constant and alternating temperature regimes except for larval and pupal stages at constant temperatures. Mean adult longevity fluctuated from 34.4 d at 15°C to 7.6 d at 35°C. Females reared under all alternating temperature regimes laid more eggs than females reared at any, except the 25°C, constant temperature treatment. The intrinsic rate of increase was highest at 27.5°C, at both the constant and the corresponding alternating temperature regimes (0.147 and 0.139, respectively). Extreme temperatures had a negative effect on life table parameters.
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Link to article at publishers website
Database assignments for author(s): Mathilde Savopoulou-Soultani

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.
	Helicoverpa armigera