Cooperative Economic Insect Report, Vol. 4
Liczba stron: 32
Wydanie: 2018 r.
Excerpt from Cooperative Economic Insect Report, Vol. 4: January 29, 1954<br><br>Forest and Shade Tree Insects: A willow aphid (lachnus saliﬂus) was abundant on willow that had been planted for a snow catch at Ln verne, Rock County. Aphids were restricted to the stems and the lower portions of limbs. (granovsky) walkingstick' (diapheromera femorata) was present but did not develop as was anticipated, probably because of ldw temperatures that occurred during the early part of the summer of 1953. As'in 1951, the last previous year of widespread walkingsti'ck feeding, 1953 overall defoliation did not approach the level observed in 1949. Only in hardwood stands south of Pillager in central Minnesota was evidence of heavy defoliation found. A cecidomyid gall was very abundant and conspicuous on aspen throughout much of the area heavily de foliated by forest tent caterpillar in previous years. Throughout most of the State also, injury by Eucosma sonomana, a jack pine shoot borer, was very much in evidence. In at least one area south of Walker, a stand of aspen, heavily defoliated by'forest tent cater pillars for the past three years showed 20 percent of the trees with fresh poplar borer (saperda calcarate) oviposition injury, Anticipated outbreaks of the introduced pine sawfly (diprion simile) and the red-beaded pine sawfly (neodiprion lecontei) did not develop.<br><br>About the Publisher<br><br>Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com<br><br>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.