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Tuesday, July 28, 2020 | History

1 edition of Dwarf mistletoe in western hemlock in southeastern Alaska found in the catalog.

Dwarf mistletoe in western hemlock in southeastern Alaska

by David B. Drummond

  • 323 Want to read
  • 33 Currently reading

Published by Methods Application Group, Forest Insect and Disease Management, Forest Service, USDA in Davis, Calif .
Written in English

    Subjects:
  • Dwarf mistletoes,
  • Western hemlock,
  • Diseases and pests,
  • Arceuthobium tsugense,
  • Forests,
  • Tsuga heterophylla

  • Edition Notes

    SeriesReport -- no. 79-6, Report (United States. Forest Insect and Disease Management. Methods Application Group) -- no. 79-6.
    ContributionsHawksworth, Frank G., 1926-, United States. Forest Insect and Disease Management. Methods Application Group
    The Physical Object
    Pagination14 pages :
    Number of Pages14
    ID Numbers
    Open LibraryOL26363668M
    OCLC/WorldCa7383337

    Sitka spruce was maintained in mixed hemlock–spruce stands over a wide range of cutting intensities. Analysis of the data did not detect significant changes in tree species composition, stand growth, hemlock dwarf mistletoe infection and incidence of tree wounding or mortality rates with partial cuts. Best Books on Alaska All Votes Add Books To This List. 1: Alaska and Back: With Dave and Dorothy by. Dorothy May Mercer (Goodreads Author) avg rating — 55 ratings. score: 1,, and 18 people voted Want to Read.

    Southeast Alaska. Abstract Approved: Everett M. Hansen Hemlock dwarf mistletoe (Arceuthobium tsugense (Rosendahi) G.N. Jones subsp. tsugense (western hemlock race)) is the most important and widespread disease of old-growth western hemlock forests in . Defect in Southeast Alaska Alaska Region, Forest Health Protection Ken Dinsmore USDA Forest Service Alaska Region, Forest Management. Decay fungi cause enormous economic • Usually on western hemlock • Often caused by dwarf mistletoe • May have sound wood, or may be associated.

    Hemlock Dwarf Mistletoe Arceuthobium tsugense (Rosendhal) G.N. Jones Hemlock dwarf mistletoe is an important disease of western hemlock in unmanaged, old-growth stands throughout southeast Alaska as far north as Haines. Although the range of western hemlock extends to the northwest along the Gulf of Alaska, dwarf mistletoe is. Tsuga heterophylla, the western hemlock or western hemlock-spruce, is a species of hemlock native to the west coast of North America, with its northwestern limit on the Kenai Peninsula, Alaska, and its southeastern limit in northern Sonoma County, California. Habitat. Tsuga heterophylla is .


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Dwarf mistletoe in western hemlock in southeastern Alaska by David B. Drummond Download PDF EPUB FB2

Introduction: The objective of this project was to estimate growth and mortality of western hemlock (Tsuga heterophylla) in southeast Alaska under varying levels of hemlock dwarf mistletoe (Arceuthobium tsugense subsp.

tsugense) infection intensity under differing stand management scenarios and over multiple time-scales. Additionally, data from this project will be used to modify and improve.

An illustration of an open book. Books. An illustration of two cells of a film strip. Video An illustration of an audio speaker. Dwarf mistletoe in western hemlock in southeastern Alaska Item Preview remove-circle Dwarf mistletoe in western hemlock in southeastern Alaska by Drummond, David B; Hawksworth, Frank G.

Western hemlock (Tsugaheterophylla (Raf.)Sarg.) regenerated within m of old-growth hemlock severely infected with dwarf mistletoe, Arceuthobiumtsugense ((Rosendahl) G.N. Jones), and left standing on cutover sites in southeast Alaska were felled and examined for infection. The percentage of understory trees infected among the examined averaged 9, 7, 5, respectively, in19 Cited by: Mature seeds of hemlock dwarf mistletoe (Arceuthobium tsugense) were placed on needles and twigs of young western hemlock trees (Tsuga heterophylla) growing on a clear felling in Juneau, Alaska in autumnand Retention of seeds over one winter averaged 65% and germination of retained seeds was %.

By Septembersome infections had developed, 78% of which Cited by: 7. Amodel was developed to predict the severity of dwarf mistletoe (Arceuthobium tsugense (Rosendahl) G.N.

Jones) in western hemlock trees (Tsuga heterophylla (Raf.)Sarg.) that developed within forests of Southeast Alaska that experienced near-catastrophic windthrow in the late by: The impacts of western hemlock dwarf mistletoe on western hemlock tree growth have been recently summarized in Muir and Hennon () and.

Studies using retrospective stem analysis have. The impact of dwarf mistletoe on the volume growth of western hemlock was evaluated in trees from five locations on northeast Vancouver Island.

Within each area, sampling was designed to minimize. Sarg.) that developed within forests of Southeast Alaska that experienced near-catastrophic windthrow in the late s. The model suggests that the degree of dwarf mistletoe severity on western hemlock trees was significantly and positively correlated with levels of dwarf mistletoe infection and basal area (m2/ha) in large and small residual.

The major dwarf mistletoes covered in this guide book are: Lodgepole pine dwarf mistletoe (Arceuthobium americanum); damage code DMP* Western hemlock dwarf mistletoe (A. tsugense); damage code DMH Western larch dwarf mistletoe (A.

laricis); damage code DML Douglas-fir dwarf mistletoe (A. douglasii); damage code DMF. Other Names: Western Hemlock-Spruce, Pacific Hemlock, Coast Hemlock, West Coast Hemlock: Size: Height: 50 to 70 m ( to ft); occasionally grows up to m ( ft).

Trunk diameter: Up to m (9 ft). Identification: Leaves (Needles): Short-stalked, finely toothed, flat, mm long, irregularly spare Cones: Ovoid, short-stalked, thin papery scales; greenish to reddish-purple.

lock dwarf mistletoe on host physiology and photosynthetic gas exchange over time, we compared the annual radial growth, δ. cell. and. cell. of co-occurring uninfected and heavily infected old-growth western hemlock trees in south-western Washington.

We applied an established leaf water O isotope fractionation model and. Dwarf mistletoe (Arceuthobium tsugense) is a serious parasite along the Pacific coast from California nearly to Glacier Bay, AK; its presence on western hemlock in the Rocky Mountain States is unconfirmed.

It increases mortality, reduces growth, lowers. PTIPS - Dwarf Mistletoe in Southeast Alaska. Division of Agriculture and Natural Resources, University of California. Development of dwarf mistletoe infections on western hemlock regeneration in southeast Alaska.

Can J Forest Res, 12, – Article Google Scholar. Tongass silviculturists rarely prescribe release, weeding, pruning, or fertilization, apart from some removal of western hemlock saplings for hemlock dwarf mistletoe (Arceuthobium tsugense) control.

From toabout 82 ha of young stands on the Tongass were precommercially thinned, starting with 85 ha in the s and peaking at Hemlock dwarf mistletoe (A. tsugense) infects western hemlock (T. heterophylla) along the west coast of North America from northern California to southeast Alaska (Hennon et al.

Hemlock dwarf mistletoe is dioecious and produces nectar-bearing flowers during mid–late summer. After pollination, fruits take 13–14 months to mature. Subsp. mertensianae (mountain hemlock dwarf mistletoe) is distinguished on Tsuga mertensiana, in the western USA, while the nominate subspecies (western hemlock dwarf mistletoe) occurs in the same area on T.

heterophylla through British Columbia, Canada up to the southern tip of Alaska, USA. southeast Alaska provided strong indications that climate currently limits hemlock dwarf mistletoe (Arceuthobium tsugense (Rosendahl) G.N.

Jones) to a subset of the range of its primary tree host, western hemlock (Tsuga heterophylla (Raf.) Sarg.), with infection varying from a high of 20% of trees at sea level to only 5% by m elevation. Development of dwarf mistletoe infections on inoculated western hemlock trees in southeast Alaska.

Dwarf mistletoes: biology, pathology, and systematics. Estimating cavity tree and snag abundance using negative binomial regression models and. Modeling the incidence and severity of hemlock dwarf mistletoe in year-old wind-disturbed forests in Southeast Alaska.

of southeast Alaska could be used to predict the severity and distribution of dwarf mistletoe in the regenerating stand. Western hemlock dwarf mistletoe occurs in coastal forests, where western hemlock is an early-successional species. Residual infected western hemlock can infect the regenerating stand that is dominated by western hemlock.

However.end of the book. Handbook Organization Sitka spruce–western hemlock forests of southeast Alaska defoliated by larvae of the black‑headed budworm inmillion hectares of western hemlock in Dwarf mistletoe causes growth loss and tree mortality but also contributes to wildlife habitat in hemlock.

Buy Weeping Hemlock Bonsai (18 years old) – Only $! Common Names: Western Hemlock, Alaska Pine, Weeping Hemlock. Origin: Native to the west coast of North America, with its northwestern limit on the Kenai Peninsula, Alaska, and its southeastern limit in northern Sonoma County, California.