Aquatic Insects in Alaska
Author : John Hudson
Publisher :
Page : 140 pages
File Size : 28,60 MB
Release : 2012
Category : Aquatic insects
ISBN : 9780939431380
Author : John Hudson
Publisher :
Page : 140 pages
File Size : 28,60 MB
Release : 2012
Category : Aquatic insects
ISBN : 9780939431380
Author : Kimberly T. Huntzinger
Publisher :
Page : 134 pages
File Size : 15,35 MB
Release : 2003
Category : Aquatic insects
ISBN :
Author : Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Publisher :
Page : 40 pages
File Size : 45,13 MB
Release : 1974
Category : Forest ecology
ISBN :
Author : Samantha Diane Hertel
Publisher :
Page : 0 pages
File Size : 31,69 MB
Release : 2016
Category :
ISBN :
Author : John S. Hard
Publisher :
Page : 40 pages
File Size : 25,16 MB
Release : 1974
Category : Forest ecology
ISBN :
Southeast Alaska's remaining virgin forests have few insect pests. The black-headed budworm and the hemlock sawfly, both western hemlock defoliators, are the most important species. They kill some trees, kill tops in others, and cause growth loss, but stands survive their attacks. Extensive conversion of virgin stands to second growth may result in an increase in pest problems as it has in similar areas such as coastal British Columbia. ??Widespread use of insecticides to control major outbreaks is not practical because of risk of contaminating salmon-spawning and trout-rearing streams; but insecticide use may be justified in local, high value areas. Weather, diseases, and parasites control outbreaks naturally. Damage-prone stands should be identified and harvested before insect attack or salvage-logged following outbreaks. Ideally, second-growth stands should be managed for resistance to insect pests.
Author : D. J. Larson
Publisher : NRC Research Press
Page : 997 pages
File Size : 18,89 MB
Release : 2000
Category : Nature
ISBN : 0660179679
This book first reviews the biology of Dytiscidae or water beetles, including life history and ecology. It then defines and keys adults & larvae (when known) of dytiscid fauna of Canada, the United States, and for some taxa also northern Mexico. The focus is on the fauna of Canada & Alaska, and adults of the 276 species known from this region are treated in detail. For each Canadian-Alaskan species, the following information is presented: nomenclature & synonymy; selected references; description, including illustrations of taxonomically important characteristics; comments on classification or variation; notes on ecology; and description of the species range, accompanied by a map of collection records. Checklists of the dytiscid fauna of Canada/Alaska are also presented, with the distribution of the species recorded by province/territory and Canadian ecozone. Includes systematic index.
Author : John Hudson
Publisher :
Page : 52 pages
File Size : 11,22 MB
Release : 2005
Category : Nature
ISBN :
Author : Roger J. Reed
Publisher :
Page : 24 pages
File Size : 39,87 MB
Release : 1966
Category : DDT (Insecticide)
ISBN :
Author : Yves Bousquet
Publisher :
Page : 444 pages
File Size : 29,59 MB
Release : 1991
Category : Nature
ISBN :
Beetles are the largest and most studied order of insects, some of which are beneficial as biological control agents. Alphabetically lists all species and subspecies of beetles known to Canada and Alaska under their respective genus-group names. Includes a brief introduction for every family treated and an index to all supraspecific names.
Author : Edward H. Holsten
Publisher :
Page : 246 pages
File Size : 30,86 MB
Release : 2009
Category : Forest insects
ISBN :