Excerpt from Effects of Aerial Application of Ddt for Tussock Moth Control on Nestling Survival of Mountain Bluebirds and House Wrens We sought to determine if ddt application had adverse, short - term effects on reproductive performance of insectivorous birds. Because of time and resource limita tions, we further limited the study to cavity-nesting, insectivorous birds. 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.

A two-season study was conducted in Union County and Walllowa County, Oregon during 1974 and 1975 to compare differences between areas sprayed with DDT and control areas.

Excerpt from Effects of Aerial Application of Ddt on Reproduction in House Wrens and Mountain and Western Bluebirds In 1975 there were no significant differences between clutch size for all three species in sprayed and control areas. There was no significant dif ference in success in hatching or fledging between sprayed and control areas for mountain bluebirds in 1975. There were differences for western blue birds and house wrens. No significant differences in mortality rates of nestlings were detected in either 1974 or 1975; only deaths that might have been caused by ddt were considered. Comparisons of the three measures of reproduction between years for mountain bluebirds revealed significantly lower success in hatching and fledging in 1975. The difference was not attributed to ddt since success in hatching was greater in sprayed areas. 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.

A two-season study was conducted in Union County and Walllowa County, Oregon during 1974 and 1975 to compare differences between areas sprayed with DDT and control areas.