Environmental Entomology (1999) 28, 307-314

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J.Y. Xia, W. Van Der Werf and R. Rabbinge (1999)
Temperature and prey density on bionomics of Coccinella septempunctata (Coleoptera : Coccinellidae) feeding on Aphis gossypii (Homoptera : Aphididae) on cotton
Environmental Entomology 28 (2), 307-314
Abstract: Life history parameters of Coccinella septempunctata L. feeding on Aphis gossypii Glover on Gossypium hirsutum L. were determined in 2 experiments. The 1st experiment addressed the effect of temperature (15, 20, 25, 30, and 35 ± 0.5°C) on C. septempunctata bionomics supplied with unlimited food. The 2nd experiment addressed the effect of food quantity on the beetle's bionomics at 25°C. Relationships of life cycle parameters with abiotic and biotic factors were described by mathematical equations. C. septempunctata developed most rapidly at 35°C, with a preimaginal period of 10.8 d. Survival from egg to adult was highest at 25°C (47%). Oviposition was greatest at 25°C, with a lifetime oviposition of 287.4 eggs per female and a mean oviposition rate during the reproductive period of 22.4 eggs per female per day. Threshold temperatures for development of the respective stages ranged from 10.9 to 13.9°C, with 12.6°C for the entire life span. The thermal constant was 42.0, 103.7, 63.6, and 302.9 DD for eggs, larvae, pupae, and adults, respectively. Over the range of prey densities tested, a 3.5-fold increase in prey density resulted in a 2-fold reduction in larval development time and a 3-fold increase in larval survival. A 2-fold increase in prey density brought about a 2-fold increase in lifetime oviposition and mean oviposition rate.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Wopke van der Werf

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
population dynamics/epizootiology

Pest and/or beneficial records:

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

Aphis gossypii Cotton (Gossypium)
Coccinella septempunctata (predator) Aphis gossypii Cotton (Gossypium)