Distribution Of Western Spruce Budworm Egg Masses On White Fir And Douglas Fir
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Distribution Of Western Spruce Budworm Egg Masses On White Fir And Douglas Fir
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Author : J. M. Schmid
language : en
Publisher:
Release Date : 1982
Distribution Of Western Spruce Budworm Egg Masses On White Fir And Douglas Fir written by J. M. Schmid and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Defoliation categories.
Comparison Of Western Spruce Budworm Populations And Damage On Grand Fir And Douglas Fir Trees
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Author : Valentine M. Carolin
language : en
Publisher:
Release Date : 1975
Comparison Of Western Spruce Budworm Populations And Damage On Grand Fir And Douglas Fir Trees written by Valentine M. Carolin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Abies grandis categories.
Western Spruce Budworm Egg Mass Dimensions
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Author : Richard Irvin Washburn
language : en
Publisher:
Release Date : 1973
Western Spruce Budworm Egg Mass Dimensions written by Richard Irvin Washburn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Insect populations categories.
Sampling Populations Of Western Spruce Budworm And Predicting Defoliation On Douglas Fir In Eastern Oregon
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Author : Valentine M. Carolin
language : en
Publisher:
Release Date : 1972
Sampling Populations Of Western Spruce Budworm And Predicting Defoliation On Douglas Fir In Eastern Oregon written by Valentine M. Carolin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Aerial photography in forestry categories.
The Western Spruce Budworm Model
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Author :
language : en
Publisher:
Release Date : 1989
The Western Spruce Budworm Model written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Western spruce budworm 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.
Differential Defoliation Of Neighboring Douglas Fir Trees By Western Spruce Budworm
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Author : Geral I. McDonald
language : en
Publisher:
Release Date : 1981
Differential Defoliation Of Neighboring Douglas Fir Trees By Western Spruce Budworm written by Geral I. McDonald and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Douglas fir categories.
Sequential Plan For Western Budworm Egg Mass Surveys In The Central And Southern Rocky Mountains
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Author : M. E. McKnight
language : en
Publisher:
Release Date : 1970
Sequential Plan For Western Budworm Egg Mass Surveys In The Central And Southern Rocky Mountains written by M. E. McKnight and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Defoliation categories.
Research Paper Rm
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Author :
language : en
Publisher:
Release Date : 1981
Research Paper Rm written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Forests and forestry categories.
Effect Of Western Spruce Budworm On Douglas Fir Cone Production In Western Montana
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Author : Allen B. Chrisman
language : en
Publisher:
Release Date : 1983
Effect Of Western Spruce Budworm On Douglas Fir Cone Production In Western Montana written by Allen B. Chrisman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Cones (Botany) categories.