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  • R.L. Thiboldeaux (a1), W.D. Hutchison (a1) and D.B. Hogg (a1)

The pea aphid, Acyrthosiphon pisum (Harris), is an important pest of alfalfa, Medicago sativa L., in Wisconsin because of its characteristic potential for exponential population growth (Hutchison and Hogg 1984, 1985) and the subsequent damage in both hay quality and quantity inflicted by high populations (Cuperus et al. 1982). In Wisconsin, as in most alfalfa-producing states, there is a vast complex of natural enemies (Hutchison and Hogg 1985) that influence pea aphid population dynamics, including the hymenopteran primary parasitoids from the Aphidiidae. These primary species, however, are also attacked by several secondary parasitoids from the families Megaspilidae, Pteromalidae, and Alloxystidae.

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G.W. Angalet , and R. Fuester . 1977. The Aphidius parasites of the pea aphid Acyrthosiphon pisum in the eastern half of the United States. Ann. ent. Soc. Am. 70: 8796.

G.W. Cuperus , E.B. Radcliffe , D.K. Barnes , and G.C. Marten . 1982. Economic injury levels and economic thresholds for pea aphid, Acyrthosiphon pisum (Harris), on alfalfa. Crop Protection 1: 453463.

D. Gonzalez , W. White , J. Hall , and R.C. Dickson . 1978. Geographical distribution of Aphidiidae (Hymenoptera) imported to California for biological control of Acyrthosiphon kondoi and Acyrthosiphon pisum (Homoptera: Aphididae). Entomophaga 23: 239248.

W.D. Hutchison , and D.B. Hogg . 1984. Demographic statistics for the pea aphid (Homoptera: Aphididae) in Wisconsin and a comparison with other populations. Environ. Ent. 13: 11731181.

W.D. Hutchison , and D.B. Hogg . 1985. Time-specific life tables for the pea aphid, Acyrthosiphon pisum (Harris), on alfalfa. Res. Popul. Ecol. 27: 231253.

J.W. Johnson , R.D. Eikenbary , and D. Holbert . 1979. Parasites of the greenbug and other graminaceous aphids: identity based on larval meconium and features of the empty aphid mummy. Ann. ent. Soc. Am. 72: 759766.

M. Mackauer , and T. Finlayson . 1967. The hymenopterous parasites (Hymenoptera: Aphidiidae et Aphelinidae) of the pea aphid in eastern North America. Can. Ent. 99: 10511082.

P.M. Marsh 1977. Notes on the taxonomy and nomenclatures of Aphidius species (Hymenoptera: Aphidiidae) parasitic on the pea aphid in North America. Entomophaga 22: 365372.

J.W. Mertins 1985. Hyperparasitoids from pea aphid mummies, Acyrthosiphon pisum (Homoptera: Aphididae), in North America. Ann. ent. Soc. Am. 78: 186197.

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The Canadian Entomologist
  • ISSN: 0008-347X
  • EISSN: 1918-3240
  • URL: /core/journals/canadian-entomologist
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