Journal of Applied Entomology (2008) 132, 638-645

R. Taghizadeh, Y. Fathipour and K. Kamali (2008)
Influence of temperature on life-table parameters of Stethorus gilvifrons (Mulsant) (Coleoptera: Coccinellidae) fed on Tetranychus urticae Koch
Journal of Applied Entomology 132 (8), 638-645
Abstract: The influence of temperature on life-table parameters, fecundity and survivorship of the predatory ladybird, Stethorus gilvifrons, fed on Tetranychus urticae was determined at seven constant temperatures of 15°C, 20°C, 25°C, 28°C, 30°C, 35°C and 40°C. No development was observed at 40°C, thus being regarded as the threshold for the development of S. gilvifrons. The results indicate a significant decrease in male and female longevity with increasing temperature from 15°C to 35°C. The longest and shortest longevity were 18.40 and 12.75 days for males and 17.40 and 8.80 days for females, respectively. The intrinsic rate of natural increase (r_m) and the net reproductive rate (R₀) of S. gilvifrons linearly increased with increasing temperatures from 15°C to 35°C, while the mean generation time (T) and doubling time (DT) decreased linearly within this temperature range. The highest values of r_m (0.240 females/female/day) and R₀ (59.27 females/female) and the lowest mean generation time (17.01 days) and DT (2.88 days) were recorded at 35°C. The maximum (185.50 eggs) and minimum (25.50 eggs) measurement of total fecundity was also recorded at 35°C and 15°C, respectively. The results indicate that temperature greatly affected fecundity, survivorship and life-table parameters of S. gilvifrons, and that 35°C is a suitable temperature for population growth of this predator.
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Link to article at publishers website
Database assignments for author(s): Yaghoub Fathipour

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tetranychus urticae
Stethorus gilvifrons (predator)	Tetranychus urticae