Resistance of Pine Hybrids to the Pine Reproduction Weevil (Classic Reprint)

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Excerpt from Resistance of Pine Hybrids to the Pine Reproduction WeevilAlthough direct control has thus been demonstrated to be success ful, it offers only a limited solution to the weevil problem in pine plantations. Natural pine types always have an endemic population of the weevil in the reproduction of uneven-aged stands. This population is capable of building up aggressive outbreaks wherever it finds exten sive even-aged stands of young trees such as occur in plantings. Hence protection of young trees cannot be assured unless spray applications are repeated each season during the period of weevil attack. Obviously, if resistant planting stock can be secured, it should cost no more to plant than susceptible stock, and subsequent high costs of protection against the weevil can be avoided.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.