by U.S. Dept. of Agriculture, Forest Service, Division of State and Private Forestry, Northern Region in Missoula, Mont .
Written in English
|Other titles||Status of the western hemlock looper in the northern region, 1972.|
|Statement||by Jerald E. Dewey, William M. Ciesla, and Rudolph C. Lood.|
|Series||Report -- no. 72-10., Report (United States. Forest Service. Northern Region) -- no. 72-10.|
|Contributions||Ciesla, William M., Lood, Rudolph C., United States. Forest Service. Northern Region. State & Private Forestry.|
|The Physical Object|
|Pagination||9 leaves :|
Dewey, J.E., W.M. Ciesla, and R.C. Lood. Status of the western hemlock looper in the Northern Region (a potentially devastating forest pest). USDA Forest Service Northern Region Division of State and Private Forestry Report # 9 ppg. , especially in the areas where an average of more than egg masses per square feet were found. Green-striped forest looper, Melanolophia imitata Green-striped forest looper populations in the Port Alice - Quatsino region declined during the larval period resulting in . Western Hemlock Looper Biology & History The western hemlock looper is periodically destructive in coastal and interior forests, reaching outbreak proportions every 11 and plus years, respectively. Outbreaks usually last about three years, after which they are generally brought under control by the action of parasites, predators, and diseases. Other information. The western hemlock looper is one of the most destructive forest defoliators in British Columbia. Major outbreaks have occurred on the coast (on Vancouver Island and adjacent south coast in ) and in the interior wetbelt (upper Fraser River , ; North Thompson-Wells Gray Park and ; Arrow Lakes ; Shuswap Lake ; Horsefly Lake.
Western Hemlock Looper The western hemlock looper is a native defoliator of western hemlock, western redcedar, interior spruce and Douglas-fir. This insect periodically reaches outbreak levels, causing severe damage to forests in both Interior and coastal stands in British Columbia. Hemlock looper outbreaks develop and subside very suddenly. They spread quickly and can cause the death of balsam firs in the first year that damage is detected. The wasteful feeding of this species and its rapid population growth make it a serious defoliator. There are four or five larval stages, depending on the region of Canada. The last outbreak was from near Baker Lake, the City of Everett Watershed surrounding Lake Chaplain, and near Arlington. There also are indications that hemlock looper populations are rising in north Idaho and possibly northeastern Washington. Here’s more information about western hemlock looper. Status of important forest insect activity in and outlook for -Newfoundland and Labrador Torgersen, T.R. Parasites of the western hemlock looper, Lambdina fiscellaria lugubrosa.
Dewey J, Ciesla W, Lood R, Status of the western hemlock looper in the Northern Region, a potentially devastating forest pest. USDA, Forest Service, Northern Regional Technical Report, Dibble C, The Hemlock measuring-worm (Ellopia fiscellaria). Michigan Quarterly Bulletin, Dooley O, Dewey J, in the Vancouver Forest Region in and forecasts population trends of some potentially damaging forest pests. Phantom hemlock looper moderately to severely defoliated western hemlock on ha at Coquitlam Lake. Douglas-fir tussock moth severely defoliated Douglas-fir trees near Chilliwack, in. The Western Hemlock (Tsuga heterophylla) is the species found in the temperate rainforest of North America. Various species of Hemlock trees can be found throughout the United States, parts of Canada, and even Asia. Most of the species thrive when growing wild in dense, moist, cool forest regions where the ground is rocky. Western Hemlock An American Wood Western hemlock is an important com-mercial softwood species in the Western United States and Canada. The largest stands are found in the humid coastal regions of Oregon, Washington, British Columbia, and Alaska. The wood is used for structural lumber, molding, roof decking, veneer, and paper. F