Large Larch Sawfly (Nematus Erichsoni).
Title | Large Larch Sawfly (Nematus Erichsoni). PDF eBook |
Author | Great Britain. Board of Agriculture and Fisheries |
Publisher | |
Pages | |
Release | 1907 |
Genre | Forest insects |
ISBN |
The Large Larch Sawfly
Title | The Large Larch Sawfly PDF eBook |
Author | R. Stewart MacDougall |
Publisher | |
Pages | 20 |
Release | 1906 |
Genre | Larch sawfly |
ISBN |
The Large Larch Saw-Fly (Nematus Erichsoni) (Classic Reprint)
Title | The Large Larch Saw-Fly (Nematus Erichsoni) (Classic Reprint) PDF eBook |
Author | Charles Gordon Hewitt |
Publisher | Forgotten Books |
Pages | 24 |
Release | 2017-10-28 |
Genre | Science |
ISBN | 9781527922044 |
Excerpt from The Large Larch Saw-Fly (Nematus Erichsoni) The females begin to deposit their eggs almost immediately after emerging from the cocoons, especially if the weather is warm and sunny as they reproduce parthenogenetically there is no necessity for them to await fertilisation by the male. The eggs are deposited on the stems of the fresh green terminal shoots in small slits made by the saw-like appendages of the ovipositor. The slits are made along the shimts'with the result that the green terminal shoot is killed by the numerous wounds and curls round in a characteristic m'anner (fig. The presence of these brown and curled dead terminal shoots is often a means of detecting the presence of the larvae when they do not occur in sutiicient numbers to indicate their presence by much defoliation of the twigs. The eggs appear to be deposited chiefly on the lower branches of. The trees, as I found. That on the trees which were only moderately attacked the larva: were most numerous on the shoots of the lower branches and these usually showed signs of defoliation bei't re the branches nearer the top of the tree. The beginning of the attack on the lower branches is probably explained by the. Fact which has already been mentioned, namely, that the females begin. To lay almost im mediately after emergence they would naturally on emerging from the cocoons lying beneath the turf, &e., fly on to the lower branches first. 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.
An Ecological Study of the Larch Sawfly (Lygaeonematus Erichsonii Hartig).
Title | An Ecological Study of the Larch Sawfly (Lygaeonematus Erichsonii Hartig). PDF eBook |
Author | Hubert Lawrence Person |
Publisher | |
Pages | 74 |
Release | 1922 |
Genre | |
ISBN |
The Large Larch Saw-fly (Nematus Erichsoni) [microform]
Title | The Large Larch Saw-fly (Nematus Erichsoni) [microform] PDF eBook |
Author | C Gordon (Charles Gordon) 1 Hewitt |
Publisher | Legare Street Press |
Pages | 24 |
Release | 2021-09-10 |
Genre | |
ISBN | 9781015340992 |
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
The Larch Sawfly
Title | The Larch Sawfly PDF eBook |
Author | Arnold Thomas Drooz |
Publisher | |
Pages | 56 |
Release | 1960 |
Genre | Larch sawfly |
ISBN |
Technical Bulletin
Title | Technical Bulletin PDF eBook |
Author | |
Publisher | |
Pages | 1090 |
Release | 1959 |
Genre | Agriculture |
ISBN |