Excerpt from Roundheaded Apple-Tree Borer: Its Life, History and Control Within the bounds Of its range there are many limited districts where the borer does not occur, or, at least, where it is very uncom mon. Just why this is true can not be fully explained, but the ah sence of native host trees and the abundance of those species of wood pecker which prey-upon the borers are two factors which Often have much to do with the local scarcity Of the pest. Areas of comparative freedom and corresponding areas that are heavily infested Often exist near together for years at a time with little relative change. 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.