WebMar 21, 2012 · Of the more than 300 species of Psocoptera described in North America, 44 species have been documented on eastern hemlock, Tsuga canadensis (L.) Carrière, in … Tsuga is a genus of conifers in the subfamily Abietoideae of Pinaceae, the pine family. The common name hemlock is derived from a perceived similarity in the smell of its crushed foliage to that of the unrelated plant poison hemlock. Unlike the latter, Tsuga species are not poisonous. The genus comprises eight to … See more They are medium-sized to large evergreen trees, ranging from 10–60 metres (33–197 feet) tall, with a conical to irregular crown, the latter occurring especially in some of the Asian species. The leading shoots … See more The species are all adapted to (and are confined to) relatively moist, cool temperate areas with high rainfall, cool summers, and little … See more • "Hemlock-tree" . New International Encyclopedia. 1905. • Media related to Tsuga at Wikimedia Commons See more Mountain hemlock (T. mertensiana) is unusual in the genus in several respects. The leaves are less flattened and arranged all round the shoot, and have stomata above as well as … See more The wood obtained from hemlocks is important in the timber industry, especially for use as wood pulp. Many species are used in horticulture, and numerous cultivars have been selected … See more
Tree of Life: Western Hemlock - Food as Medicine
WebApr 14, 2024 · New Hemlock Hybrid Withstands Killing Insect. By Kim Kaplan April 14, 2024. WASHINGTON, D.C., April 14, 2024—A first-of-its-kind hybrid hemlock, which is not vulnerable to the insect hemlock woolly adelgid, has been developed by the Agricultural Research Service's U.S. National Arboretum.. Traveler, as the new variety is named, is a … WebFeb 26, 2024 · The largest trees are probably in Tsuga heterophylla. The oldest trees are probably T. mertensiana. Ethnobotany "Hemlock wood is moderately strong and pliable … hugo gernsback tomorrowland
New Hemlock Hybrid Withstands Killing Insect : USDA ARS
WebCanadian Hemlock. Tsuga canadensis. This handsome and graceful evergreen is ideal for screening, groupings, and foundation plantings. May be sheared to any height or shape … WebSymptoms On western hemlock the disease can affect one or many shoot tips on a single tree. On new shoots needles become chlorotic, shoots wilt and dieback resulting in a shepard's crook symptom. Trees take on a bushy appearance from repeated death of new shoots. In severe cases trees may die. On mountain hemlock the fungus also causes a … WebApr 29, 2015 · Specimen trees look their best with lower branches left on and touching the ground. The strong, conical form is supported by one, straight central trunk. Hardy to USDA hardiness zone 3, Canadian hemlock will grow 50 to 70 feet tall and 30 feet wide, but is tolerant of shearing and can be used for large or small, sheared screens. hugo gibel facebook