Important Forest Insect Outbreaks Alaska 1957
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Important Forest Insect Outbreaks Alaska 1957
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Author :
language : en
Publisher:
Release Date : 1957
Important Forest Insect Outbreaks Alaska 1957 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with categories.
Important Forest Insect Outbreaks Alaska 1956
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Author :
language : en
Publisher:
Release Date : 1957
Important Forest Insect Outbreaks Alaska 1956 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with categories.
Important Forest Insect Outbreaks
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Author :
language : en
Publisher:
Release Date : 1957
Important Forest Insect Outbreaks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with categories.
Important Forest Insect Outbreaks Of 1953 In Alaska Oregon And Washington
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Author :
language : en
Publisher:
Release Date : 1953
Important Forest Insect Outbreaks Of 1953 In Alaska Oregon And Washington written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1953 with categories.
Important Forest Insect Outbreaks
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Author :
language : en
Publisher:
Release Date : 1958
Important Forest Insect Outbreaks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with categories.
Important Forest Insect Outbreaks
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Author :
language : en
Publisher:
Release Date : 1957
Important Forest Insect Outbreaks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with categories.
Summary Of Forest Insect Conditions In Alaska 1957
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Author :
language : en
Publisher:
Release Date : 1957
Summary Of Forest Insect Conditions In Alaska 1957 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with categories.
Important Forest Insect Outbreaks In Oregon And Washington In 1957
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Author :
language : en
Publisher:
Release Date : 1957
Important Forest Insect Outbreaks In Oregon And Washington In 1957 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with categories.
Important Forest Insect Outbreaks In Oregon And Washington In 1957
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Author : John M. Whiteside
language : en
Publisher:
Release Date : 1957
Important Forest Insect Outbreaks In Oregon And Washington In 1957 written by John M. Whiteside and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with Forest insects categories.
The Forest Ecosystem Of Southeast Alaska
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Author : John S. Hard
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska written by John S. Hard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest ecology categories.
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.