An Analysis Of Pear Psylla Populations 1977 79

Author : Robert Eaton Fye
Publisher : Forgotten Books
ISBN 13 : 9780364840740
Total Pages : 42 pages
Book Rating : 4.8/5 (47 download)

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Download or read book An Analysis of Pear Psylla Populations, 1977-79 (Classic Reprint) written by Robert Eaton Fye and published by Forgotten Books. This book was released on 2018-03-18 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from An Analysis of Pear Psylla Populations, 1977-79 In 1978, the control programs of grower 4 showed the effectiveness of strong early season control of pear psylla (fig. However, in late July an application of amitraz was required. In the absence of additional applications, the survivors initiated large late - season populations. Predator pressures in late season were low due to the lack of a major reservoir (in an adjacent un sprayed area) to furnish the initiating populations. In 1979, the early p0pula tions of immatures were reduced by insecticide applications (fig. But the survivors of the summer insecticide applications initiated a large potential population of overwintering adults in late fall. The predators were decimated by the insecticide applications and never recovered. The data demonstrate the rapid recovery of pear psylla populations when small numbers survive insecticide applications. The necessity for miticide applications indicated some weakness in the early season control or a reservoir of mites for reinfestation of the trees. 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.