Diseases Of Pecan Trees And Pecan Insect Pests With Suggestions For Control

Author : Howard Baker
Publisher : Forgotten Books
ISBN 13 : 9781396071492
Total Pages : 24 pages
Book Rating : 4.0/5 (714 download)

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Download or read book The Obscure Scale on the Pecan and Its Control (Classic Reprint) written by Howard Baker and published by Forgotten Books. This book was released on 2018-09-10 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Obscure Scale on the Pecan and Its Control The Obscure scale is an important pest of all varieties Of pecans throughout a large portion Of the pecan belt. It attacks all parts Of the tree proper, developing first on the lower, inner portions of the trees and spreading gradually outward and upward. Limbs up to 3 inches in diameter are most frequently killed by its attacks. The greatest injury results from the gradual killing Of branches and the weakening of infested trees, which renders them more subject to attack by borers, other insects, and diseases. Eggs are first extruded between the middle of May and early in June, and crawlers Can be found a few days later. Both eggs and crawlers are present in large numbers throughout June and until the middle Of July, after which they gradually-decrease in numbers until by the first of August only a few remain. The first crawlers settle under Old scale covers, and those that emerge from beneath the cover of the parent scale settle within a short time and usually not far away. They gradually increase in size, and their covers assume the color Of the surface on which they 'are resting. Most of the Winter is passed by the male scale in the second larval stage and by the female in the stage preparatory to the second molt. Development is resumed late in the winter, and most specimens reach the adult stage by the middle of April, adult males emerging as the females are completing the final molt. Mating takes place at once and eggs are soon formed. There is but a single generation each year. Parasites, predators, and diseases exert a considerable influence in reducing the numbers of this scale, and in some instances appear to hold infestations in check without the aid of artificial control measures, though artificial control is usually necessary. 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.