Skip to Main Content
Development of Sirococcus shoot blight following thinning in western hemlock regeneration.Author(s): Charles G. Shaw; Thomas H. Laurent; Spencer Israelson
Source: Res. Note PNW-RN-387. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 6 p
Publication Series: Research Note (RN)
Station: Pacific Northwest Research Station
Download Publication (107 KB)
DescriptionShoot mortality from Sirococcus strobilinus Preuss. and other causes was recorded by crown position from April 1978 through October 1979 in younggrowth western hemlock (Tsuga heterophylla (Raf.) Sarg.) crop trees released in a 1977 thinning at Thomas Bay, Alaska. All study trees contained some infected shoots, but no terminal leaders were killed by shoot blight. On individual trees, the number of shoots killed by S. strobilinus between April 1978 and October 1979 was significantly correlated with the level of shoot blight mortality present in April 1978. Disease occurrence was highest in the lower crown, but differences in the level of shoot mortality between lower, middle, and upper crown locations were not significant. Disease occurrence during 1978 and 1979 was markedly lower than that in 1976 and 1977. After thinning, shoot blight appears to be causing little damage to hemlock crop trees; suggesting that thinning operations can proceed at Thomas Bay with confidence that the selected crop trees will suffer little, if any, damage from the disease.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationShaw, Charles G., III; Laurent, Thomas H.; Israelson, Spencer. 1981. Development of Sirococcus shoot blight following thinning in western hemlock regeneration. Res. Note PNW-RN-387. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 6 p
KeywordsShoot blight, diseases (plant), western hemlock, Tsuga heterophylla Alaska (Thomas Bay)
- Occurrence of insect and disease pests on young-growth Sitka spruce and western hemlock in southeastern Alaska.
- Growth of site trees and stand structure in mixed stands of Pacific silver fir and western hemlock.
- Effects of different sources of fertilizer nitrogen on growth and nutrition of western hemlock seedlings.
XML: View XML