Download or read book Sampling Populations of Western Spruce Budworm and Predicting Defoliation on Douglas fir in Eastern Oregon written by Valentine M. Carolin and published by . This book was released on 1972 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparison of Western Spruce Budworm Populations and Damage on Grand Fir and Douglas fir Trees written by Valentine M. Carolin and published by . This book was released on 1975 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method of Estimating Log Weights written by Charles N. Mann and published by . This book was released on 1972 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book USDA Forest Service Research Paper PNW written by and published by . This book was released on 1973 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of COWFISH for Predicting Trout Populations in Grazed Watersheds of the Intermountain West written by Craig R. Contor and published by . This book was released on 1991 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: The COWFISH model, developed and applied in selected Montana streams, was tested on 14 streams in Idaho, Nevada, and Utah, where it proved to have little value for predicting numbers of trout in watersheds grazed by livestock. The model holds promise for estimating the health of stream channels and riparian complexes.

Download or read book Sampling Methods for Forest and Shade Tree Insects of North America written by and published by . This book was released on 2001 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book USDA Forest Service General Technical Report PNW written by and published by . This book was released on 1977 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Foresters Almanac 1977 written by and published by . This book was released on 1977 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sampling Western Spruce Budworm Larvae by Counting Larvae on Lower Crown Branches written by Richard R. Mason and published by . This book was released on 1989 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Historical Patterns of Western Spruce Budworm and Douglas fir Tussock Moth Outbreaks in the Northern Blue Mountains Oregon Since A D 1700 written by and published by . This book was released on 1995 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Managing Trees and Stands Susceptible to Western Spruce Budworm written by Martha H. Brookes and published by . This book was released on 1985 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Technical Report PSW written by and published by . This book was released on 1978 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Integrating Fire Management Analysis Into Land Management Planning written by Thomas John Mills and published by . This book was released on 1983 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guide to Testing Insecticides on Coniferous Forest Defoliators written by Carroll B. Williams and published by . This book was released on 1985 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Het rapport bevat richtlijnen voor onderzoek van insekticidentoediening in naaldbossen. In het Westen van de Verenigde Staten worden naaldbossen periodiek geinfecteerd met epidemische populaties van insekten die de bomen van hun naalden ontdoen. Ofschoon deze gids primair gebaseerd is op onderzoeken van populaties van naaldboomrupsen kan veel van de weergegeven informatie gebruikt worden voor andere insekten die de bomen van hun bladeren of naalde ontdoen

Download or read book Monitoring Larval Populations of the Douglas fir Tussock Moth and the Western Spruce Budworm on Permanent Plots written by Robert R. Mason and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Procedures for monitoring larval populations of the Douglas-fir tussock moth and the western spruce budworm are recommended based on many years experience in sampling these species in eastern Oregon and Washington. It is shown that statistically reliable estimates of larval density can be made for a population by sampling host trees in a series of permanent plots in a geographical monitoring unit. The most practical method is to estimate simultaneously densities on a plot of both insect species by the nondestructive sampling of foliage on lower crown branches of host trees. This can be done either by counting all larvae on sample branches or by estimating the frequency of occurrence of a selected threshold number of larvae in samples. Statistics are given on the expected within- and between-plot variances and the number of sample plots needed in different sized monitoring units. In large monitoring units, plot densities of tussock moth and budworm larvae usually are not normally distributed, but they can be normalized by logarithmic transformation to predict the probability of subpopulations of any given density occurring somewhere in the unit. It is urged that sampling methods be consistent and that monitoring be done annually to accumulate continuous databases that reflect the behavior of defoliator populations over a long period.

Download or read book Monitoring Larval Populations of the Douglas fir Tussock Moth and the Western Spruce Budworm on Permanent Plots written by Richard R. Mason and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Budbreak Sprays for Site Preparation and Release from Six Coastal Brush Species written by Ronald Eugene Stewart and published by . This book was released on 1974 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: