Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-25T06:38:07.715Z Has data issue: false hasContentIssue false
  • English
  • Français

COMPETITION AND CO-OPERATION BETWEEN CHRYSOCHARIS LARICINELLAE AND AGATHIS PUMILA ON LARCH CASEBEARER IN QUEBEC

Published online by Cambridge University Press:  31 May 2012

F. W. Quednau
F. W. Quednau
Affiliation:
Forest Research Laboratory, Department of Fisheries and Forestry, Quebec, Quebec
Get access Rights & Permissions [Opens in a new window]

Abstract

Agathis pumila (Ratzeburg) and Chrysocharis laricinellae (Ratzeburg) compete for their common host, the larch casebearer (Coleophora laricella (Hübner)). An analysis of the mechanism of this competition, based on a 2-year study at Joliette, Que., is presented. A. pumila, in sacrificing part of its own population, prevents a "one stage condition" and helps C. laricinellae build up to a point where the latter becomes host-regulative by massive attack. Competitive displacement of A. pumila by C. laricinellae is less frequent than expected because of the basically different ways in which the two parasite species spread, search for, select, and attack hosts. A. pumila may suffer about 50% loss from multiple parasitism, but apparently this does not affect its survival potential, its reproductive rate, and its ability to provide significant partial control of the larch casebearer.

Type
Articles
Information
The Canadian Entomologist , Volume 102 , Issue 5 , May 1970 , pp. 602 - 612
Copyright
Copyright © Entomological Society of Canada 1970

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Cody, J. B. 1963. The rate of spread of Agathis pumila (Ratz.). (Unpub.) Dissertation, Univ. of Michiean.Google Scholar
Compere, H., and Smith, H. S.. 1932. The control of the citrophilus mealybug Pseudococcusgahani by Australian parasites. Hilgardia 6: 585–618.CrossRefGoogle Scholar
Eidmann, H. H. 1965. Okologische und physiologische Studien über die Lärchenminiermotte Coleophora laricella Hbn. Studia for. Suecica 32: 1–226.Google Scholar
Flanders, S. E. 1965. Competition and co-operation among parasitic hymenoptera related to biological control. Can. Ent. 97: 409–422.CrossRefGoogle Scholar
Graham, A. R., 1949. Developments in the control of the larch casebearer, Coleophora laricella (Hbn.). Rep. ent. Soc. Ont. 79: 45–50.Google Scholar
Graham, A. R. 1958. Effectiveness of two introduced parasites of the larch casebearer, Coleophora laricella (Hbn.). (Lepidoptera: Coleophoridae) in Ontario. Rep. ent. Soc. Ont. 88: 37–41.Google Scholar
Quednau, F. W. 1967 a. Notes on mating behaviour and oviposition of Chrysocharis laricininellae (Ratz.) (Hymenoptera: Eulophidae), a parasite of the larch casebearer (Coleophora laricella (Hbn.)). Can. Ent. 99: 326–331.CrossRefGoogle Scholar
Quednau, F. W. 1967 b. Ecological observations on Chrysocharis laricinellae (Ratz.) (Hymenoptera: Eulophidae), a parasite of the larch casebearer Coleophora laricella. Can. Ent. 99: 631–641.CrossRefGoogle Scholar
Quednau, F. W. 1968. Distribution and effectiveness of larch casebearer parasites in southwestern Quebec. Bi-mon. Res. Notes 24: 22–23.Google Scholar
Quednau, F. W. 1969. Laboratory propagation of the parasite Chrysocharis laricinellae (Hymenoptera: Eulophidae) and notes on interaction with its host, Coleophora laricella. Can. Ent. 101: 100–106.CrossRefGoogle Scholar
Sloan, N. F. 1965. Biotic factors affecting populations of the larch casebearer, Coleophora laricella, Hbn. in Wisconsin. (Unpub.) Dissertation, Univ. of Wisconsin.Google Scholar
Sloan, N. F., and Coppel, H. C. 1965. The insect parasites of the larch casebearer, Coleophora laricella Hübner (Lepidoptera, Coleophoridae) in Wisconsin with keys to the adults and mature larval remains. Wis. Acad. Sci. Arts Lett. 54: 125–146.Google Scholar
Smith, H. S. 1929. Multiple parasitism: its relation to the biological control of insect pests. Bull. ent. Res. 20: 141–149.CrossRefGoogle Scholar
Smith, H. S., and DeBach, P.. 1953. Artificial infestations of plants with pest insects as an aid in biological control. Proc. 7th Pacif. Sci. Congr., Auckland, Vol. 4, pp. 255–259.Google Scholar
Sundby, R. 1957. The parasites of Phyllocnistis labyrinthella Bjerk. and their relation to the population dynamics of the leaf-miner. Norsk ent. Tidsskr. Suppl 2.Google Scholar
Thorpe, W. H. 1933. Notes on the natural control of Coleophora laricella, the larch casebearer. Bull. ent. Res. 24: 271–291.CrossRefGoogle Scholar
Turnbull, A. L., and Chant, D. A.. 1961. The practice and theory of biological control of insects in Canada. Can. J. Zool 39: 697–753.CrossRefGoogle Scholar
Webb, F. E. 1953. An ecological study of the larch casebearer, Coleophora laricella Hbn. (Lepidoptera: Coleophoridae). (Unpub.) Ph.D. Thesis, Univ. of Michigan.Google Scholar