Field and Laboratory Techniques for Evaluating Hemlock Sawfly Infestations

Excerpt from Field and Laboratory Techniques for Evaluating Hemlock Sawfly Infestations Figure 2.-feeding colony of early instar hemlock sawfly larvae. Note-character of needles which have been fed upon. Figure 3. - hemlock sawfly cocoon showing the evenly cut margin of cap resulting from normal sawfly emergence. Figure 4.-severe defoliation of mature western hemlock caused by hemlock sawfly. 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.