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MORTALITY OF EGGS OF THE LARCH CASEBEARER (LEPIDOPTERA: COLEOPHORIDAE) IN OREGON

Published online by Cambridge University Press:  31 May 2012

R.B. Ryan
R.B. Ryan
Affiliation:
Forestry and Range Sciences Laboratory, Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, La Grande, Oregon USA 97850
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Abstract

Eggs of the larch casebearer, Coleophora laricella (Hübner), were sampled for 6 years at 3 sites in Oregon to determine causes of mortality. Infertility was of minor importance. Predation by Deraeocoris diveni Knight, Phytocoris calli Knight (Heteroptera: Miridae), and perhaps other predators caused up to 28.4% mortality. Up to 58.5% of the remaining embryos died before or at the time of hatching, probably as a result of high temperatures.

Résumé

Les oeufs du porte-case du mélèze, Coleophora laricella (Hübner), ont été échantillonnés pendant 6 ans à 3 sites en Oregon afin de déterminer les causes de mortalité. L'infertilité s'est avérée d'importance mineure. La prédation par Deraeocoris diveni Knight, Phytocoris calli Knight (Heteroptera: Miridae), et possiblement d'autres prédateurs, a causé jusqu'à 28,4% de mortalité. Jusqu'à 58,5% des embryons restants sont morts avant ou lors de l'éclosion, probablement dû aux températures élevées.

Type
Articles
Information
The Canadian Entomologist , Volume 117 , Issue 8 , August 1985 , pp. 991 - 994
Copyright
Copyright © Entomological Society of Canada 1985

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References

Baird, A.B. 1923. Some notes on the natural control of the larch sawfly and larch casebearer in New Brunswick in 1922. Acadian ent. Soc. Proc. Nova Scotia 8: 158–171.Google Scholar
Brown, M.W., and Kulhavy, D.L.. 1978. Pre-overwintering mortality in the larch casebearer, Coleophora laricella (Lepidoptera: Coleophoridae), on western larch in northern Idaho. Jr. ent. Soc. Br. Col. 75: 29–83.Google Scholar
DeBach, P., and Huffaker, C.B.. 1971. Experimental techniques for evaluation of the effectiveness of natural enemies. pp. 113–140in Huffaker, C.B. (Ed.), Biological Control. Plenum Press, New York.Google Scholar
Denton, R.E. 1972. Establishment of Agathis pumila (Ratz.) for control of larch casebearer, and notes on native parasitism and predation in Idaho. U.S. Dept. Agric., For. Serv., Res. Note INT-164. 6 pp. Intermtn. For. & Range Exp. Stn., Ogden, Utah.Google Scholar
Denton, R.E. 1979. Larch casebearer in western larch forests. U.S. Dep. Agric., For. Serv., Gen. Tech. Rep. INT-55. 62 pp. Intermtn. For. & Range Exp. Stn., Ogden, Utah1.Google Scholar
Eidmann, H. 1965. Ökologische und physiologische Studien über die Lärchenminiermotte, Coleophora laricella Hbn. Stud. For. Suecica 32. 222 pp.Google Scholar
Jagsch, A. 1973. Populationsdynamik und Parasitenkomplex der Lärchenminiermotte, Coleophora laricella Hbn., im Natürlichen Verbreitungsgebiet der Europäischen Larche, Larix decidua Mill. Z. ang. Ent. 73: 1–42.CrossRefGoogle Scholar
Ryan, R.B. 1980. Rearing methods and biological notes for seven species of European and Japanese parasites of the larch casebearer (Lepidoptera: Coleophoridae). Can. Ent. 112: 1239–1248.CrossRefGoogle Scholar
Sloan, N.F. 1965. Biotic factors affecting populations of the larch casebearer, Coleophora laricella Hbn. in Wisconsin. Ph.D. thesis, University of Wisconsin. 193 pp.Google Scholar
Webb, F.E. 1953. An ecological study of the larch casebearer, Coleophora laricella Hbn. (Lepidoptera: Coleophoridae). Ph.D. thesis, University of Michigan. 210 pp.Google Scholar