Outbreaks of the Western Spruce Budworm in the American Northern Rocky Mountain Area from 1922 Through 1971 PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Outbreaks of the Western Spruce Budworm in the American Northern Rocky Mountain Area from 1922 Through 1971 PDF full book. Access full book title Outbreaks of the Western Spruce Budworm in the American Northern Rocky Mountain Area from 1922 Through 1971 by Philip Cornwell Johnson. Download full books in PDF and EPUB format.
Author: Philip Cornwell Johnson
Publisher:
ISBN:
Category : Western spruce budworm
Languages : en
Pages : 152
Get Book Here
Book Description
Author: Philip Cornwell Johnson
Publisher:
ISBN:
Category : Western spruce budworm
Languages : en
Pages : 152
Get Book Here
Book Description
Author: Philip Cornwell Johnson
Publisher:
ISBN:
Category : Western spruce budworm
Languages : en
Pages : 144
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 804
Get Book Here
Book Description
Author: David Frederic Gibson
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 712
Get Book Here
Book Description
Author: George T. Ferrell
Publisher:
ISBN:
Category : Defoliation
Languages : en
Pages : 16
Get Book Here
Book Description
Mature grand firs (Abies grandis [Dougl. ex D. Don] Lindl.) were sampled in two stands, one cutover and one virgin, in the Little Salmon River drainage in west-central Idaho, to estimate stem volume losses associated with topkilling. Damage to the stands resulted from three outbreaks of western spruce budworm (Choristoneura occidentalis Freeman) in 1922-30, 1952-55, and 1969-78. Stems of the firs were dissected and examined for reductions in height and radial growth, stem deformities, and decay associated with topkills. Merchantable volume losses (to a minimum 4-inch diameter top) were calculated for each outbreak. Greatest volume loss was associated with tops killed by the 1922-30 outbreak. Loss varied widely among the trees and stands sampled. In the cutover stand, which received a sanitation cutting in the late 1960's, firs topkilled by the 1922-30 outbreak averaged losses of 9.5 ft3 (0.3 m3), amounting to 11.1 percent of merchantable stem volume. In the vigin stand, losses averaged 26.3 ft3 (0.3 m3) or 20.5 percent of stem volume. Topkill-associated decays, caused mainly by Indian paint fungus (Echinodontium tinctorium Ell. and Ev.) were responsible for most of this loss. Smaller volume losses were recorded in firs topkilled by the 1952-55 outbreak. Losses per tree averaged 3.3 ft3 (0.1 m3) or 5.4 percent in the cutover stand, and 0.5 ft3 (0.02 m3) or 0.3 percent in the virgin stand. These losses resulted mainly from height growth reductions rather than decay. No merchantable volume losses were recorded for the 1969-78 outbreak.
Author: David G. Fellin
Publisher:
ISBN:
Category : Western spruce budworm
Languages : en
Pages : 12
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 12
Get Book Here
Book Description
Author: Katharine A. Sheehan
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 40
Get Book Here
Book Description
Author: Allen B. Chrisman
Publisher:
ISBN:
Category : Cones (Botany)
Languages : en
Pages : 12
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 426
Get Book Here
Book Description
