Hostname: page-component-76fb5796d-zzh7m Total loading time: 0 Render date: 2024-04-26T14:26:20.580Z Has data issue: false hasContentIssue false
  • English
  • Français

BIOLOGICAL STUDIES OF BUD MINING SAWFLIES, PLERONEURA SPP. (HYMENOPTERA: XYELIDAE), ON WHITE FIR IN THE CENTRAL SIERRA NEVADA OF CALIFORNIA: III. MORTALITY FACTORS OF EGG, LARVAL, AND ADULT STAGES AND A PARTIAL LIFE TABLE

Published online by Cambridge University Press:  31 May 2012

C. P. Ohmart  and
D. L. Dahlsten
C. P. Ohmart
Affiliation:
Division of Biological Control, University of California, Berkeley 94720
D. L. Dahlsten
Affiliation:
Division of Biological Control, University of California, Berkeley 94720
Get access Rights & Permissions [Opens in a new window]

Abstract

The mortality factors for three species of Pleroneura were identified for the egg, larval, and adult stages. Allophroides n.sp. and Scambus transgressus (Hymenoptera: Ichneumonidae) were observed parasitizing the larval stages and four spiders were found preying on Pleroneura adults. Quantitative assessments of mortality in the egg and larval stages were made and tabulated in the form of a partial life table. Allophroides n. sp. was the dominant mortality factor in the larval stage. Mortality of unknown cause also was a substantial mortality factor.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 8 , August 1979 , pp. 883 - 888
Copyright
Copyright © Entomological Society of Canada 1979

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

Ohmart, C. P. and Dahlsten, D. L.. 1977, 1978. Biological studies of bud mining sawflies, Pleroneura spp. (Hymenoptera: Xyelidae), on white fir in the central Sierra Nevada of California. I. Life cycles, niche utilization, and interaction between larval feeding and tree growth. Can. Ent. 109: 1001–1007 (1977);CrossRefGoogle Scholar
II. Larval distribution within tree crowns. Can. Ent. 110: 583–590 (1978).CrossRefGoogle Scholar
Southwood, T.R.E. 1966. Ecological Methods. Chapman and Hall, London. 391 pp.Google Scholar