The Fir Engraver
Author | : George R. Struble |
Publisher | : |
Total Pages | : 20 |
Release | : 1957 |
Genre | : Fir |
ISBN | : |
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Author | : George R. Struble |
Publisher | : |
Total Pages | : 20 |
Release | : 1957 |
Genre | : Fir |
ISBN | : |
Author | : George R. Struble |
Publisher | : |
Total Pages | : 28 |
Release | : 1937 |
Genre | : Abies concolor |
ISBN | : |
Author | : George T. Ferrell |
Publisher | : |
Total Pages | : 8 |
Release | : 1986 |
Genre | : Bark beetles |
ISBN | : |
Author | : George R. Struble |
Publisher | : Forgotten Books |
Total Pages | : 26 |
Release | : 2017-10-28 |
Genre | : |
ISBN | : 9780266867135 |
Excerpt from The Fir Engraver Beetle: A Serious Enemy of White Fir and Red Fir Attacks are made along the main trunk, usually in roughened bark surrounding the bases of branches. When a suitable spot has been selected for an entrance hole, the female rotates about it and cuts bits of bark away. Within from 36 to 48 hours the hole is ex tended at an upward slant to the cambium layer. The surfaces of the sapwood and inner bark are then deeply grooved to form a nuptial chamber large enough to accommodate two beetles. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author | : George R. Struble |
Publisher | : |
Total Pages | : 16 |
Release | : 1937 |
Genre | : Abies concolor |
ISBN | : |
Author | : Robert E. Stevens |
Publisher | : |
Total Pages | : 8 |
Release | : 1971 |
Genre | : Bark beetles |
ISBN | : |
Author | : Donald Richard Owen |
Publisher | : |
Total Pages | : 4 |
Release | : 2003 |
Genre | : Fir |
ISBN | : |
Author | : United States. Department of Agriculture |
Publisher | : |
Total Pages | : |
Release | : 1937 |
Genre | : |
ISBN | : |
Author | : George R. Struble |
Publisher | : |
Total Pages | : 0 |
Release | : 1957 |
Genre | : Fir |
ISBN | : |
Author | : George R. Struble |
Publisher | : Forgotten Books |
Total Pages | : 26 |
Release | : 2017-10-28 |
Genre | : |
ISBN | : 9780266902829 |
Excerpt from The Fir Engraver: A Serious Enemy of Western True Firs The mature adult is black, shin ing, from 3 to 5 mm. Long, and more active than most bark beetles. In lateral profile the ventral part Of the abdomen is incurved (fig. Newly formed adults remain quiet for a period of 7 to 14 days or longer before boring to the outside Of the bark, during which colora tion deepens from light ivory to black. They may be Observed from June 1 to September 10, but are most numerous in flight during July and August. Emergence is ex tended over such a long period that few beetles are seen in flight at any particular time. They have never been Observed to fly in pairs, groups, or swarms, but Often gather in numbers on out logs. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.