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THE PHENOLOGY AND DISTRIBUTION OF APHIDS IN CALIFORNIA ALFALFA AS MODIFIED BY LADYBIRD BEETLE PREDATION (COLEOPTERA: COCCINELLIDAE)1

Published online by Cambridge University Press:  31 May 2012

A. P. Gutierrez ,
C. G. Summers  and
J. Baumgaertner
A. P. Gutierrez
Affiliation:
Division of Biological Control, Department of Entomological Sciences, University of California, Berkeley 94720
C. G. Summers
Affiliation:
Division of Entomology and Parasitology, Department of Entomological Sciences, University of California, Berkeley 94720
J. Baumgaertner
Affiliation:
Entomologisches Institut ETH, CH—8000 Zurich, Switzerland
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Abstract

The phenologies and distributions of pea aphid (Acyrthosiphon pisum (Harris)), blue alfalfa aphid (A. kondoi (Shinji)), and spotted alfalfa aphid (Therioaphis maculata (Buckton)) were intensively studied in California alfalfa. The results showed, as expected, that aphid populations across all densities were aggregated; but that ladybird beetle (Hippodamia convergens (G.-M.)) predation increased the degree of aggregation. The distribution parameters of the aphids were estimated using methods developed by Iwao and Kuno (1971).

Résumé

Les phénologies et distributions du puceron du pois, Acyrthosiphon pisum (Harris), A. kondoi (Shinji), et Therioaphis maculata (Buckton) ont été étudiées intensivement sur la luzerne en Californie. Les résultats ont montré, tel qu’attendu, que les populations de pucerons forment des agrégats à toutes les densités; et que la prédation par la coccinelle Hippodamia convergens (G.-M.) augmente le degré d’agrégation des pucerons. Les paramètres décrivant la distribution des pucerons ont été estimés grâce à des méthodes mises au point par Iwao et Kuno (1971).

Type
Articles
Information
The Canadian Entomologist , Volume 112 , Issue 5 , 01 May 1980 , pp. 489 - 495
Copyright
Copyright © Entomological Society of Canada 1980

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References

Byerly, K. F., Gutierrez, A. P., Jones, R. E., and Luck, R. F.. 1978. A comparison of sampling methods for some arthropod populations in cotton. Hilgardia 46: 256–282.CrossRefGoogle Scholar
Christensen, J. B., Gutierrez, A. P., Cothran, W. R., and Summers, C. G.. 1977. The within field spatial pattern of the larval Egyptian alfalfa weevil, Hypera brunneipennis (Coleoptera: Curculionidae): An application of parameter estimates in simulation. Can. Ent. 109: 1599–1604.CrossRefGoogle Scholar
Frazer, B. and Gilbert, N. E.. 1976. Coccinellids and aphids: A qualitative study on the impact of adult ladybirds (Coleoptera: Coccinellidae) preying on the field populations of pea aphids (Homoptera: Aphididae). J. ent. Soc. Br. Columb. 73: 33–56.Google Scholar
Gutierrez, A. P. and van den Bosch, R.. 1970. Studies on host selection and host specificity of the aphid hyperparasite Charips victrix (Hymenoptera: Cynipidae). 1. Review of hyperparasitism and the field ecology of Charips victrix. Ann. ent. Soc. Am. 63: 1345–1354.CrossRefGoogle Scholar
Iwao, S. and Kuno, E.. 1971. An approach to the analysis of aggregation patterns. pp. 311–335in Patiel, B. P., Pielou, E. C., and Waters, W. E. (Eds.), Statistical Ecology, Vol. I: Spatial patterns and statistical distributions. Penn. State Univ. Press.Google Scholar
LLoyd, M. 1967. Mean crowding. J. Anim. Ecol. 36: 1–30.CrossRefGoogle Scholar
Messenger, P. S. 1964. Use of life tables in a bioclimatic study of an experimental aphid-braconid wasp host-parasite system. Ecology 45: 119–131.CrossRefGoogle Scholar
Neuenschwander, P., Hagen, K. S., and Smith, R. F.. 1977. Predation of aphids in California's alfalfa fields. Hilgardia 43: 53–78.CrossRefGoogle Scholar