Author: Boyd E. WickmanPublisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 12
Book Description
Douglas Fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of White Fir in Southern Orgeon
Author: Boyd E. WickmanPublisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 12
Book Description
Douglas Fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of Grand Fir and Douglas-fir in Northeastern Oregon
Author: Boyd E. WickmanPublisher:
ISBN:
Category : Abies grandis
Languages : en
Pages : 20
Book Description
Douglas-Fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of White Fir in Southern Oregon (Classic Reprint)
Author: Boyd E. WickmanPublisher: Forgotten Books
ISBN: 9780364766804
Category : Science
Languages : en
Pages : 20
Book Description
Excerpt from Douglas-Fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of White Fir in Southern Oregon This study also provided phenol ogy and degree - day information for concurrent population studies which facilitated sampling and scheduling of other research activities. 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.
Douglas-fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of White Fir in Southern Oregon
Author: Boyd E. WickmanPublisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 0
Book Description
Degree-day Accumulation Related to the Phenology of Douglas-fir Tussock Moth and White Fir During Five Seasons of Monitoring in Southern Oregon
Author: Boyd E. WickmanPublisher:
ISBN:
Category : Douglas-fir tussock moth
Languages : en
Pages : 12
Book Description
Douglas Fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of Grand Fir and Douglas-Fir in Northeastern Oregon (Classic Reprint)
Author: Boyd E. WickmanPublisher: Forgotten Books
ISBN: 9780266838340
Category : Science
Languages : en
Pages : 26
Book Description
Excerpt from Douglas Fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of Grand Fir and Douglas-Fir in Northeastern Oregon Bud burst, shoot elongation, egg hatch, and larval development were studied on six areas in a 1973 infestation in the Blue Moun tains. Bud burst and egg hatch were found to be closely related to accumulated degree-days, and peak egg hatch occurred after all buds had burst and shoots were 50 percent or more elongated. Larval development then closely followed shoot elongation. This synchrony of host and insect phenology provides an easily observed field event for monitoring Douglas fir tussock moth development. 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.
Douglas Fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of Grand Fir and Douglas-fir in Notheastern Oregon
Author: Boyd E. WickmanDouglas Fir Tussock Moth Egg Hatch and Larval Development in Relation to Phenology of Grand Fir and Douglas-fir in Northeastern Oregon
Author: Boyd E. WickmanPublisher:
ISBN:
Category : Abies grandis
Languages : en
Pages : 90
Book Description
Douglas-fir Tussock Moth
Author: Robert W. CampbellPublisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 176
Book Description
This annotated bibliography includes references to 338 papers. Each deals in some way with either the Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), or a related species. Specifically, 210 publications and 82 unpublished documents make some reference, at least, to the Douglas-fir tussock moth; 55 are concerned with other species in the same genus. The subject matter in each paper has been indexed to at least one general topic (General, Taxonomy, Biology, Host Relationships, Outbreaks, Control, Related Material). Most of these general topics have been subdivided into more specific headings. For example, Host Relationships includes separate categories for white fir, grand fir, and Douglas-fir. A complete listing of the references in each general and specific category is presented in the index.
Monitoring Larval Populations of the Douglas-fir Tussock Moth and the Western Spruce Budworm on Permanent Plots
Author: Robert R. MasonPublisher:
ISBN:
Category : Douglas fir tussock moth
Languages : en
Pages : 32
Book Description
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.