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THE FUNCTIONAL RESPONSE OF PHYTOSEIULUS PERSIMILIS (ACARINA: PHYTOSEIIDAE) TO VARIOUS DENSITIES OF TETRANYCHUS URTICAE (ACARINA: TETRANYCHIDAE)

Published online by Cambridge University Press:  31 May 2012

P. Everson
P. Everson
Affiliation:
Department of Biology, University of Victoria, Victoria, British Columbia V8W 2Y2
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Abstract

The functional response of the predacious mite Phytoseiulus persimilis Athias-Henriot to increases in the prey density of adult female Tetranychus urticae Koch was examined. Previous studies on artificial substrates have described the functional response curve of P. persimilis to adult female prey as dome-shaped, because as prey density increased the predator was disturbed by prey activity.

An experiment to determine the effect of artificial and natural substrates on the activity level of T. urticae was conducted. T. urticae showed a significant increase in activity on artificial substrates of plastic and waterproof paper compared with a substrate of excised bean leaf (Phaseolus vulgaris L.). Since prey activity was significantly influenced by substrate, the functional response of P. persimilis to adult female T. urticae was re-examined. P. persimilis exposed to various densities of T. urticae on excised bean leaf disks (5 cm2) showed a functional response curve having a curvilinear rise to a plateau as prey densities increased from 0.2 to 10.0 prey/cm2.

The functional response curve predicted by Holling’s disk equation did not differ significantly from the observed functional response curve.

The rate of successful search and the handling time predicted by the disk equation were 0.194 and 10.34 h respectively.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 1 , January 1979 , pp. 7 - 10
Copyright
Copyright © Entomological Society of Canada 1979

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References

Burnett, T. 1970 a. Effect of temperature on a greenhouse acarine predator-prey population. Can. J. Zool. 48: 555–562.CrossRefGoogle Scholar
Burnett, T. 1970 b. Effect of simulated natural temperatures on an acarine predator-prey population. Physiol. Zool. 43: 155–165.CrossRefGoogle Scholar
Burnett, T. 1971. Prey consumption in acarine predator-prey populations reared in the greenhouse. Can. J. Zool. 49: 903–913.CrossRefGoogle Scholar
Hassell, M. P., Lawton, J. H., and Beddington, J. R.. 1976. The components of arthropod predation I. The prey death-rate. J. Animal Ecol. 45: 138–164.CrossRefGoogle Scholar
Holling, C. S. 1959. Some characteristics of simple types of predation and parasitism. Can. Ent. 91: 385–398.CrossRefGoogle Scholar
Holling, C. S. 1965. The functional response of predators to prey density and its role in mimicry and population regulation. Mem. ent. Soc. Can. 45. 60 pp.Google Scholar
Holling, C. S. 1966. The functional response of invertebrate predators to prey density. Mem. ent. Soc. Can. 48. 86 pp.Google Scholar
Laing, J. E. and Osborn, J. A. L., 1974. The effect of prey density on the functional and numerical responses of three species of predatory mites. Entomophaga 19: 267–277.CrossRefGoogle Scholar
Mori, H. and Chant, D. A.. 1966. The influence of prey density, relative humidity, and starvation of the predacious behavior of Phytoseiulus persimilis Athias-Henriot (Acarina: Phytoseiidae). Can. J. Zool. 44: 483–491.CrossRefGoogle Scholar
Poole, R. W. 1974. An introduction to quantitative ecology. McGraw-Hill, New York. 532 pp.Google Scholar
Pruszynski, S. 1976. Observations on the predacious behavior of Phytoseiulus persimilis. SROP/WPRS Bull. 4: 39–45.Google Scholar
Sandness, J. N. and McMurtry, J. A.. 1970. Functional response of three species of Phytoseiidae (Acarina) to prey density. Can. Ent. 102: 692–704.CrossRefGoogle Scholar
Santos, M. A. 1975. Functional and numerical responses of the predatory mite, Amblyseius fallacis, to prey density. Environ. Ent. 4: 989–992.CrossRefGoogle Scholar
Solomon, M. E. 1949. The natural control of animal populations. J. Animal Ecol. 18: 1–35.CrossRefGoogle Scholar
Takafuji, A. and Chant, D. A.. 1976. Comparative studies of two species of predacious phytoseiid mites (Acarina: Phytoseiidae) with special reference to their responses to the density of their prey. Researches Popul. Ecol. Kyoto Univ. 17: 255–310.Google Scholar
Theaker, T. L. and Tonks, N. V.. 1977. A method for rearing the predacious mite Phytoseiulus persimilis Athias-Henriot (Acarina: Phytoseiidae). J. ent. Soc. Br. Columb. 74: 8–9.Google Scholar