Hostname: page-component-745bb68f8f-d8cs5 Total loading time: 0 Render date: 2025-01-10T23:51:42.975Z Has data issue: false hasContentIssue false
  • English
  • Français

REGRESSION FOR ESTIMATING NUMBER OF DOUGLAS-FIR TUSSOCK MOTH EGGS RELATIVE TO EGG MASS WEIGHT1

Published online by Cambridge University Press:  31 May 2012

Roy C. Beckwith ,
R. R. Mason  and
H. G. Paul
Roy C. Beckwith
Affiliation:
Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Corvallis, Oregon 97331
R. R. Mason
Affiliation:
Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Corvallis, Oregon 97331
H. G. Paul
Affiliation:
Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Corvallis, Oregon 97331
Get access Rights & Permissions [Opens in a new window]

Abstract

A common regression equation, representing data collected from four widely separated areas, was constructed to determine number of eggs of the Douglas-fir tussock moth based on individual egg mass weights. The regression is designed for use in any egg mass sampling scheme where a knowledge of the potential early instar population is required. The regression equation is also given for each area.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 2 , 01 February 1978 , pp. 131 - 134
Copyright
Copyright © Entomological Society of Canada 1978

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

Beckwith, R. C. 1976. Influence of host foliage on the Douglas-fir tussock moth. Environ. Ent. 5: 73–77.CrossRefGoogle Scholar
Luck, R. F. and Dahlsten, D. L.. 1967. Douglas-fir tussock moth (Hemerocampa pseudotsugata) egg-mass distribution on white-fir in northeastern California. Can. Ent. 99: 1193–1203.CrossRefGoogle Scholar
Mason, R. R. 1974. Population change in an outbreak of the Douglas-fir tussock moth, Orgyia pseudotsugata (Lepidoptera: Lymantriidae), in central Arizona. Can. Ent. 106: 1171–1174.CrossRefGoogle Scholar
Mason, R. R., Beckwith, R. C., and Paul, H. G.. 1977. Fecundity reduction during collapse of a Douglas-fir tussock moth outbreak in northeast Oregon. Environ. Ent. 6: 623–627.CrossRefGoogle Scholar
Watt, K. E. F. 1968. A computer approach to analysis of data on weather, population fluctuations, and disease, pp. 145–159. In Lowry, W. P. (Ed.), Biometeorology.Google Scholar
Wickman, B. E., Mason, R. R., and Thompson, C. G.. 1973. Major outbreaks of the Douglas-fir tussock moth in Oregon and California. U.S. Dep. Agric. For. Serv. Gen. Tech. Rep. PNW-5. 18. pp. Pacif. Northwest For. & Range Exp. Stn., Portland, Ore.Google Scholar