Download The Balsam Woolly Aphid Problem in Oregon and Washington (Classic Reprint) - Norman E Johnson file in PDF Online

Full Download The Balsam Woolly Aphid Problem in Oregon and Washington (Classic Reprint) - Norman E Johnson file in PDF

Excerpt from The Balsam Woolly Aphid Problem in Oregon and WashingtonA European insect, commonly called the balsam woolly aphid or chermes, is damaging and killing true fir (abies) in western Oregon and washington. Some acres are known to be infested. Tree killing has reached the point where concerted action is needed. Major salvage plans are being developed by private

Title : The Balsam Woolly Aphid Problem in Oregon and Washington (Classic Reprint)
Author : Norman E Johnson
Language : en
Rating :
4.90 out of 5 stars
Type : PDF, ePub, Kindle
Uploaded : Apr 06, 2021

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