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THE FUNCTIONAL RESPONSE AND PREY PREFERENCE OF FELTIELLA ACARISUGA (VALLOT) (DIPTERA: CECIDOMYIIDAE) FOR TWO OF ITS PREY: MALE AND FEMALE TWOSPOTTED SPIDER MITES, TETRANYCHUS URTICAE KOCH (ACARI: TETRANYCHIIDAE)

Published online by Cambridge University Press:  31 May 2012

G.P. Opit ,
B. Roitberg  and
D.R. Gillespie
G.P. Opit
Affiliation:
Coast Agri Ltd., 19574 60th Avenue, Surrey, British Columbia, Canada V3S 8E5 and Centre for Pest Management, Simon Fraser University, Bumaby, British Columbia, Canada V5A IS6
B. Roitberg
Affiliation:
Centre for Pest Management, Simon Fraser University, Bumaby, British Columbia, Canada V5A 1S6
D.R. Gillespie
Affiliation:
Pacific Agriculture Research Centre, PO Box 1000, Agassiz, British Columbia, Canada V0M 1A0
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Abstract

The preference of the predatory midge, Feltiella acarisuga (Vallot), for adult male and female twospotted spider mite, Tetranychus urticae Koch, was examined using functional response models. The midge exhibited a type-II functional response to each prey. Handling time was estimated to be much higher for the female mites than for the males (1.52 vs. 0.40 h). Estimated instantaneous search rates for the female and male mites were similar (1.32 vs. 1.28). A preference index of 1.03 was calculated using the ratio of the instantaneous search rates. Feltiella acarisuga was found to exhibit no preference for either female or male mites; when both prey were present in equal numbers, midge larvae killed as many females as males.

Résumé

La préférence de la cécidomyie prédatrice Feltiella acarisuga (Vallot) pour les adultes mâles et femelles de la Tétranyque à deux points, Tetranychus urticae Koch, a été étudiée au moyen de modèles de réaction fonctionnelle. La cécidomyie manifestait une réaction fonctionnelle de type II à l’égard de chacune des proies. La durée de la manipulation des proies s’est avérée beaucoup plus longue lorsque les proies étaient des acariens femelles (1,52 vs. 0,40 h pour les mâles). Les taux instantanés de recherche ont été estimés et se sont avérés équivalents que les proies aient été des mâles ou des femelles (1,32 vs. 1,28). Un indice de préférence de 1,03 a été calculé à partir du rapport entre les taux instantanés de recherche. Feltiella acarisuga n’a pas manifesté de préférence particulière pour les femelles ou les mâles de l’acarien; en présence de proies des deux sexes en nombres égaux, les larvae de la cécidomyie ont tué autant de femelles que de mâles.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 129 , Issue 2 , April 1997 , pp. 221 - 227
Copyright
Copyright © Entomological Society of Canada 1997

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References

Cock, M.J.W. 1978. The assessment of preference. Journal of Animal Ecology 47: 805–816.CrossRefGoogle Scholar
Currie, D.J. 1982. Estimating Michaelis-Menten parameters: Bias, variance, and experimental design. Biometrics 38: 907–919.CrossRefGoogle Scholar
Everson, P. 1979. The functional response of Phytoseiulus persimilis (Acarinae: Phytoseiidae) to various densities of Tetranychus urticae (Acarina: Tetranychidae). The Canadian Entomologist 111: 7–10.CrossRefGoogle Scholar
Fan, Y., and Petitt, F.L.. 1994. Parameter estimation of the functional response. Environmental Entomology 23: 785–794.CrossRefGoogle Scholar
Flinn, P.W., Hower, A.A., and Taylor, R.A.J.. 1985. Preference of Reduviolus americoferus (Hemiptera: Nabidae) for potato leafhopper nymphs and pea aphids. The Canadian Entomologist 117: 1503–1508.CrossRefGoogle Scholar
Foglar, H., Malausa, J.C., and Wajnberg, E.. 1990. The functional response and preference of Macrolophus caliginosus (Heteroptera: Miridae) for two of its prey: Myzus persicae and Tetranychus urticae. Entomophaga 35: 465–474.CrossRefGoogle Scholar
Gillespie, D.R., Quiring, D.M.J., Opit, G., and Greenwood, M.. 1994. Biological Control of Two-spotted Spider Mites on Greenhouse Tomato. Pacific Agriculture Research Center, Technical Report 105: 18 pp.Google Scholar
Holling, C.S. 1959. Some characteristics of simple types of predation and parasitism. The Canadian Entomologist 91: 385–398.CrossRefGoogle Scholar
Houck, M.A. 1986. Prey preference in Stethorus punctum (Coleoptera: Coccinellidae). Environmental Entomology 15: 967–970.CrossRefGoogle Scholar
Houck, M.A., and Strauss, R.E.. 1985. The comparative study of functional responses: Experimental design and statistical interpretation. The Canadian Entomologist 117: 617–629.CrossRefGoogle Scholar
Murdoch, W.W. 1973. The functional response of predators. The Journal of Applied Ecology 10: 335–341.Google Scholar
Murdoch, W.W., and Oaten, A.. 1975. Predation and population stability. Advances in Ecological Research 9: 1–131.CrossRefGoogle Scholar
Opit, G.P. 1995. Predation of Two-spotted Spider Mites, Tetranychus urticae Koch (Acari: Tetranychiidae) by the Predatory Midge, Feltiella minuta Felt (Diptera: Cecidomyiidae). Master's of Pest Management thesis, Simon Fraser University, Burnaby, BC. 109 pp.Google Scholar
Van Haren, R.J., Steenhuis, M.M., Sabelis, M.W., and de Ponti, O.M.B.. 1987. Tomato stem trichomes and dispersal success of Phytoseiulus persimilis relative to its prey Tetranychus urticae. Experimental and Applied Acarology 3: 239–269.CrossRefGoogle Scholar