Douglas Fir Tussock Moth Egg Hatch And Larval Development In Relation To Phenology Of Grand Fir And Douglas Fir In Northeastern Oregon
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Douglas Fir Tussock Moth Egg Hatch And Larval Development In Relation To Phenology Of Grand Fir And Douglas Fir In Northeastern Oregon
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Author : Boyd E. Wickman
language : en
Publisher:
Release Date : 1976
Douglas Fir Tussock Moth Egg Hatch And Larval Development In Relation To Phenology Of Grand Fir And Douglas Fir In Northeastern Oregon written by Boyd E. Wickman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Abies grandis categories.
Audience Attention As A Basis For Evaluating Interpretive Presentations
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Author : Ronald Eugene Dick
language : en
Publisher:
Release Date : 1975
Audience Attention As A Basis For Evaluating Interpretive Presentations written by Ronald Eugene Dick and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Recreation areas categories.
Usda Forest Service Research Paper Pnw
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Author :
language : en
Publisher:
Release Date : 1978
Usda Forest Service Research Paper Pnw written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Forests and forestry categories.
Douglas Fir Tussock Moth Egg Hatch And Larval Development In Relation To Phenology Of Grand Fir And Douglas Fir In Northeastern Oregon Classic Reprint
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Author : Boyd E. Wickman
language : en
Publisher: Forgotten Books
Release Date : 2017-10-27
Douglas Fir Tussock Moth Egg Hatch And Larval Development In Relation To Phenology Of Grand Fir And Douglas Fir In Northeastern Oregon Classic Reprint written by Boyd E. Wickman and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-27 with Science categories.
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 White Fir In Southern Orgeon
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Author : Boyd E. Wickman
language : en
Publisher:
Release Date : 1977
Douglas Fir Tussock Moth Egg Hatch And Larval Development In Relation To Phenology Of White Fir In Southern Orgeon written by Boyd E. Wickman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Abies concolor categories.
Instar Development Of The Douglas Fir Tussock Moth In Relation To Field Temperatures
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Author : R. C. Beckwith
language : en
Publisher:
Release Date : 1993
Instar Development Of The Douglas Fir Tussock Moth In Relation To Field Temperatures written by R. C. Beckwith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Boise National Forest (Idaho) categories.
Monitoring Larval Populations Of The Douglas Fir Tussock Moth And The Western Spruce Budworm On Permanent Plots
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Author : Robert R. Mason
language : en
Publisher:
Release Date : 1994
Monitoring Larval Populations Of The Douglas Fir Tussock Moth And The Western Spruce Budworm On Permanent Plots written by Robert R. Mason and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Douglas fir tussock moth categories.
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.
Monitoring Larval Populations Of The Douglas Fir Tussock Moth And The Western Spruce Budworm On Permanent Plots
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Author : Richard R. Mason
language : en
Publisher:
Release Date : 1994
Monitoring Larval Populations Of The Douglas Fir Tussock Moth And The Western Spruce Budworm On Permanent Plots written by Richard R. Mason and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Douglas fir tussock moth categories.
Technical Bulletin
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Author :
language : en
Publisher:
Release Date : 1979
Technical Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Agricultural extension work categories.
Monthly Catalog Of United States Government Publications
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1977
Monthly Catalog Of United States Government Publications written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Government publications categories.
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index