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 Sampling Populations of Western Spruce Budworm and Predicting Defoliation on Douglas fir in Eastern Oregon written by and published by . This book was released on 1973 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sampling Populations of Western Spruce Budworm and Predicting Defoliation on Douglas fir in Eastern Oregon written by Brian R. Wall and published by . This book was released on 1972 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sampling Populations of Western Spruce Budworm and Predicting Defoliation on Douglas fir in Eastern Oregon written by Brian R. Wall and published by . This book was released on 1972 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sampling Populations of Western Spruce Budworm and Predicting Defoliation on Douglas Fir in Eastern Oregon Classic Reprint written by Valentine M. Carolin and published by Forgotten Books. This book was released on 2018-09-07 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Sampling Populations of Western Spruce Budworm and Predicting Defoliation on Douglas-Fir in Eastern Oregon A cluster design appeared to be the best solution for sampling these stages. For low, medium, and high populations, number and size of clusters per stand and number of stands were determined for means with an acceptable sampling error of 20 percent, at p z 0. 05, and also other precision and confidence levels. Sampling requirements were particularly great for low egg populations and medium populations of larvae in buds. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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 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 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 Distribution of Western Spruce Budworm Egg Masses on White Fir and Douglas fir written by J. M. Schmid and published by . This book was released on 1982 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Technical Bulletin written by and published by . This book was released on 1985 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Western Spruce Budworm written by David G. Fellin and published by . This book was released on 1982 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Western Spruce Budworm Model written by and published by . This book was released on 1989 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings Management and Productivity of Western montane Forest Soils written by Craig R. Contor and published by . This book was released on 1991 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Dynamics of the Major North American Needle eating Budworms written by Robert W. Campbell and published by . This book was released on 1993 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method for Sampling Western Spruce Budworm Pupae written by Nilima Srivastava and published by . This book was released on 1981 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Technical Report INT written by and published by . This book was released on 1991 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: