Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-29T16:16:50.598Z Has data issue: false hasContentIssue false
  • English
  • Français

DEFOLIATION OF WHITE BIRCH BY THE BIRCH CASEBEARER, COLEOPHORA FUSCEDINELLA (LEPIDOPTERA: COLEOPHORIDAE)

Published online by Cambridge University Press:  31 May 2012

D. G. Bryant  and
A. G. Raske
D. G. Bryant
Affiliation:
Newfoundland Forest Research Centre, Canadian Forestry Service, St. John's, Newfoundland
A. G. Raske
Affiliation:
Newfoundland Forest Research Centre, Canadian Forestry Service, St. John's, Newfoundland
Get access Rights & Permissions [Opens in a new window]

Abstract

Defoliation by the birch casebearer, Coleophora fuscedinella Zeller, the most important pest of white birch, Betula papyrifera Marsh., in Newfoundland, is correlated with leaf size but the differences in defoliation associated with leaf size are too small to be of practical importance. Thus, a sample of at least eight leaves from either the top crown quarter or from mid crown will give consistent estimates of tree defoliation, and 14 trees should be sampled to classify a stand for appraisal surveys or for evaluation of damage to scenic areas. Evaluation of stand defoliation in three broad classes is recommended: up to 30% defoliation appears as light browning not noticed by the general public, 30% to 90% results in distinct browning, and over 90% defoliation denotes intensive browning and bud and branch mortality.

Type
Articles
Information
The Canadian Entomologist , Volume 107 , Issue 2 , February 1975 , pp. 217 - 224
Copyright
Copyright © Entomological Society of Canada 1975

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

Benjamin, D. M., Freeman, G. H., and Brown, E. S.. 1968. The determination of irregularly-shaped areas of leaves destroyed by chewing insects. Ann. appl. Biol. 61: 13–17.CrossRefGoogle Scholar
Clark, R. C. and Richardson, K.. 1972. A. Rep. Forest Insect & Disease Surv. (Newfoundland Region) 1971: 11–18. Environ. Can., For. Serv.Google Scholar
Cochran, S. G. 1974 (unpub.). Biology and control of the birch casebearer in Newfoundland. M.Sc. Thesis, McGill University. 126 pp.Google Scholar
Raizenne, H. 1952. Forest Lepidoptera of southern Ontario and their parasites. Can. Dep. Agric., Sci. Serv., Div. Forest Biol. 277 pp.Google Scholar
Reeks, W. A. 1951. The birch casebearer, Coleophora salmani Heinr. Can. Dep. Agric., Sci. Serv., Div. Forest Biol., Bi-mon. Prog. Rep. 7: 1.Google Scholar
Reeks, W. A., Carroll, W. J., Underwood, G. R., and Cuming, F. G.. 1953. A. Rep. Forest Insect & Disease Surv. (Maritime Provinces): 7–19. Can. Dep. Agric., Div. Forest Biol.Google Scholar
Rowe, J. S. 1972. Forest regions of Canada. Publ. Environ. Can., For. Serv., No. 1300. 172 pp.Google Scholar
Salman, K. A. 1929. Notes on the immature stages and biology of a birch casebearer. Ann. ent. Soc. Am. 22: 480–488.CrossRefGoogle Scholar
Snedecor, G. W. 1956. Statistical methods, 5 ed. Iowa State Coll. Press.Google Scholar