Author: Fred Barrows KnightPublisher: Forgotten Books
ISBN: 9780365077831
Category : Business & Economics
Languages : en
Pages : 22
Book Description
Excerpt from Estimating Engelmann Spruce Beetle Infestations in the Central Rocky Mountains Newly infested trees are difficult to recognize even at short distances, because pitch tubes at the points of attack generally are very small or absent. Each tree must be inspected carefully around the base for red dust from borings. Engelmann spruce is the primary host of the beetle although lodgepole pine and blue spruce also are attacked uhen mixed with Engelmann spruce. Although many lodgepole pines die, the insect broods usually do not develop to maturity. 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.