Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-22T02:39:46.671Z Has data issue: false hasContentIssue false
  • English
  • Français

ESTIMATION OF HEMLOCK SAWFLY (HYMENOPTERA: DIPRIONIDAE) FECUNDITY

Published online by Cambridge University Press:  31 May 2012

John S. Hard
John S. Hard
Affiliation:
Forestry Sciences Laboratory, Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Juneau, Alaska
Get access Rights & Permissions [Opens in a new window]

Abstract

Mean fecundity of hemlock sawfly females emerging from cocoons collected on heavily defoliated western hemlock trees was significantly less than fecundity of females collected from lightly defoliated trees. Fecundity was highly correlated with female cocoon diameter and female forewing length, but was most highly correlated with both variables combined. Time-saving double sampling techniques are discussed for determining mean fecundities of new samples when mean cocoon diameter and forewing length are known.

Type
Articles
Information
The Canadian Entomologist , Volume 108 , Issue 9 , September 1976 , pp. 961 - 966
Copyright
Copyright © Entomological Society of Canada 1976

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

Cochran, W. G. 1963. Sampling techniques, 2d ed. Wiley, New York. 413 pp., illus.Google Scholar
Hard, J. S. 1971 a. Effects of semistarvation during late larval stages on survival and fecundity of the hemlock sawfly in the laboratory. U.S. Dep. Agric. For. Serv. Res. Note PNW-157. 8 pp., illus. Pacif. Northwest For. & Range Exp. Stn., Portland, Oreg.Google Scholar
Hard, J. S. 1971 b. Sequential sampling of hemlock sawfly eggs in southeast Alaska. U.S. Dep. Agric. For. Serv. Res. Note PNW-142. 9 pp., illus. Pacif. Northwest For. & Range Exp. Stn., Portland, Oreg.Google Scholar
Hard, J. S. 1976. Natural control of hemlock sawfly, Neodiprion tsugae (Hymenoptera: Diprionidae), populations in southeast Alaska. Can. Ent. 108: 485–498.CrossRefGoogle Scholar
Heron, R. J. 1955. Studies on the starvation of last-instar larvae of the larch sawfly, Pristiphora erichsonii (Htg.) (Hymenoptera: Tenthredinidae). Can. Ent. 87: 417–427, illus.CrossRefGoogle Scholar
Heron, R. J. 1966. The reproductive capacity of the larch sawfly and some factors of concern in its measurement. Can. Ent. 98: 561–578, illus.CrossRefGoogle Scholar
Lyons, L. A. 1970. Some population features of reproductive capacity in Neodiprion swainei (Hymenoptera: Diprionidae). Can. Ent. 102: 68–84, illus.CrossRefGoogle Scholar
Philogène, B. J. R. 1972. [The effects of simulated rainfall on larvae of Neodiprion swainei (Hymenoptera: Diprionidae).] Can. Ent. 104: 895–896.CrossRefGoogle Scholar
Philogène, B. J. R. and Benjamin, D. M.. 1971. Temperature and photoperiod effects on the immature stages and adults of Neodiprion swainei (Hymenoptera: Diprionidae). Can. Ent. 103: 1705–1715, illus.CrossRefGoogle Scholar