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Showing 1 to 20 of 81 for “"hemlock"”.
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Radial growth response of eastern hemlock to infestation of hemlock woolly adelgid
Hemlock woolly adelgid (Adelges tsugae Annand) is causing defoliation and mortality of eastern hemlock (Tsuga canadensis (L.) Carrière) in the eastern United States. The objectives of this study were to quantify changes in tree-ring width and wood anatomy for trees that survived adelgid …
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Hemlock and Other Stories
<p>Hemlock and Other Stories is a collection of short stories focusing primarily on the importance of geography and cultural identity in modern America. Other stories explore similar themes but contain international and/or historical settings. Ultimately, most characters in the selected stories …
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Abundance Of Songbirds In Eastern Hemlock Stands Following Chemical Treatment For Hemlock Woolly Adelgid
<p>In the 1960’s the invasive Hemlock Woolly Adelgid (Adelges tsugae [hereafter, HWA]) began to spread west across the hemlock stands of the Eastern U.S. killing a significant number of Eastern Hemlock (Tsuga canadensis). While chemical treatments, primarily with the active ingredient imidacloprid, …
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Eastern Hemlock Needle Physiology as Impacted by Hemlock Wooly Adelgid and Treatment with Imidacloprid
Eastern hemlock (Tsuga canadensis [L.] Carr.) is a foundation species that occupies a unique niche in forest ecosystems and which often forms pure stands throughout the eastern United States. Throughout the last half of a century, widespread mortality of T. canadensis had been occurring with the …
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HEMLOCK: HEterogeneous ModeL Of Computation Kernel for SystemC
As SystemC gains popularity as a System Level Design Language (SLDL) for System-On-Chip (SOC) designs, heterogeneous modelling and efficient simulation become increasingly important. The key in making an SLDL heterogeneous is the facility to express different Models Of Computation (MOC). Currently, …
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Fitness and Physiology of the Hemlock Woolly Adelgid, Adelges tsugae, in Relation to the Health of the Eastern Hemlock, Tsuga canadensis
The hemlock woolly adelgid (HWA), Adelges tsugae Annand (Hemiptera: Sternorrhyncha: Adelgidae) is a small invasive insect that frequently causes hemlock (Tsugae spp.) mortality in the eastern United States. Studies have shown that once healthy hemlocks become infested by the adelgid, nutrients are …
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Assessing hemlock woolly adelgid induced decline and susceptibility using hyperspectral technologies
… band hyperspectral instruments to assess early hemlock decline and susceptibility to the introduced hemlock woolly adelgid (HWA). To this end, spectral data from an ASD FieldSpec Pro was used to develop a 6-term linear regression equation, which predicted a detailed decline rating (0--10) with …
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The effect of forest fertilization on the ectomycorrhizae of western hemlock (tsuga heterophylla)
… old stand composed almost exclusively of western hemlock [Tsuga heterophylla (Rafn.)Sarg.], located in the Mount Seymour Demonstration Forest, North Vancouver, British Columbia. Changes in the abundance of 10mycorrhizal types (Cenococcum geophilum Fr., Lactarius scrobiculatus (Scop.) ex. Fr., …
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Poison hemlock (conium Maculatum L.) : biology, implications for pastures and response to herbicides
Poison hemlock is a biennial, toxic and invasive weed that grows along roadsides, pastures and low-disturbed areas. Research was conducted to determine seed ecology, growth characteristics and response to herbicides. Seed production, viability and germination of poison hemlock seed were measured. …
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Evaluation of hybridization among three Laricobius species, predators of hemlock woolly adelgid, (Adelgidae)
… spp. involved in the biological control of hemlock woolly adelgid (Adelges tsugae Annand). Following lab mating studies, there was no evidence that Laricobius osakensis Montgomery and Yu could produce hybrid progeny with either Laricobius nigrinus Fender or Laricobius rubidus LeConte. …
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The influence of salal on planted hemlock and cedar saplings on northern Vancouver Island
… 2- and 4-year-old conifer performance (western hemlock (Tsuga heterophylla (Raf.) Sarg.) and western red cedar (Thujaplicata Donn ex D. Don)) and salal (Gaultheria shallon Pursh) leaf area index, and the effect of salal leaf area index on the 2-year growth increment of western red cedar …
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Structure and function of western red cedar and western hemlock forests on northern Vancouver Island
… red cedar (Thujaplicata Donn) and western hemlock (Tsuga heterophylla (Raf.) Sarge) (the CH type), and a windstorm-derived, second-growth type dominated by western hemlock and amabilis fir (Abies amabilis (Dougl.) Forbes) that largely originated following a widespread windstorm in 1906 (the …
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The role of olfaction in host-finding by two specialist predators of hemlock woolly adelgid
The hemlock woolly adelgid (HWA), Adelges tsugae Annand (Homoptera: Adelgidae), is forest pest introduced to eastern North America in the early 1950's. Although this pest occurs on both landscape and nursery stock as well as in natural stands of hemlock forest, pesticides are only practical and …
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In-Stream Hemlock Twig Breakdown and Effects of Reach-Scale Twig Additions on Appalachian Headwater Streams
Eastern hemlock (Tsuga canadensis) is a prominent tree in the forests of eastern North America, where it commonly grows along headwater streams. It is experiencing widespread mortality due to infestations of an introduced insect, the hemlock woolly adelgid (Adelges tsugae). Eliminations of tree …
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