Download or read book Western Black headed Budworm and Hemlock Sawfly in Alaska written by R. A. Mask and published by . This book was released on 1992 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Evaluation of Hemlock Sawfly and Western Black headed Budworm in Southeast Alaska During 1973 written by Bruce H. Baker and published by . This book was released on 1973 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mortality of Overwintering Eggs of Black headed Budworm and Hemlock Sawfly in Southeast Alaska written by and published by . This book was released on 1966 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mortality of Overwintering Eggs of the Black headed Budworm and Hemlock Sawfly in Southeast Alaska written by Donald C. Schmiege and published by . This book was released on 1966 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Evaluation of the Black headed Budworm and Hemlock Sawfly in the Hemlock spruce Stands of Southeast Alaska written by George L. Downing and published by . This book was released on 1959 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Western Hemlock Damage Caused by the Black headed Budworm written by George L. Downing and published by . This book was released on 1957 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Insect and Disease Conditions in Alaska in written by and published by . This book was released on 2001 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Hemlock Sawfly in Southeast Alaska written by John S. Hard and published by . This book was released on 1968 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Western Hemlock Damage Caused by the Black headed Budworm Appraisal Survey written by G. L. Downing and published by . This book was released on 1957 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Health Conditions in Alaska 2007 written by and published by . This book was released on 2008 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Forest Ecosystem of Southeast Alaska written by John S. Hard and published by . This book was released on 1974 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Forest Health Conditions in Alaska 2007 A Forest Health Protection Report R10 PR 18 April 2008 written by and published by . This book was released on 2008 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insects and Diseases of Alaskan Forests written by Edward H. Holsten and published by . This book was released on 1981 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Insect and Disease Conditions in Alaska written by and published by . This book was released on 1979 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Health Conditions in Alaska 2006 written by John Lundquist and published by . This book was released on 2007 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest health conditions in Alaska2006 written by and published by DIANE Publishing. This book was released on with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Insect and Disease Conditions in Alaska in written by and published by . This book was released on 2000 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: