Download or read book Leaf hoppers and Their Natural Enemies written by Robert Cyril Layton Perkins and published by . This book was released on 1905 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaf Hoppers and Their Natural Enemies Introduction Classic Reprint written by Robert Cyril Layton Perkins and published by Forgotten Books. This book was released on 2017-11-21 with total page 1066 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Leaf-Hoppers and Their Natural Enemies (Introduction) To the Committee on Experiment Station, H. S. P, A Hono lulu, T. H. Gentlemen 1 - 1 herewith submit for publication the Introduc tion to the Bulletin On Leaf - Hoppers and Their Natural Ene mies, and also an index to this Bulletin. The latter has been prepared by Mr. G. W. Kirkaldy. Although the material deal ing with the subject of Leaf - Hoppers is far from being com pletely worked out, and new material is from time to time being accumulated, yet I have thought it advisable to close Bulletin l. Which has now reached a length of more than 500 pages. At the same time, considering the practical and scientific value of such work. I hope that the subject will be continued in another lulletin. 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.
Download or read book LEAF HOPPERS AND THEIR NATURAL ENEMIES INTRODUCTION written by ROBERT CYRIL LAYTON. PERKINS and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaf Hoppers and Their Natural Enemies written by and published by . This book was released on 1906 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LEAF HOPPERS THEIR NATURAL E written by Otto Herman 1869 Swezey and published by Wentworth Press. This book was released on 2016-08-27 with total page 1078 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. 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. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Leaf Hoppers and Their Natural Enemies written by Robert Cyril Layton Perkins and published by . This book was released on 1905 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LEAF HOPPERS AND THEIR NATURAL ENEMIES written by R. C. L. and Kirkaldy Perkins (G. W.) and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaf Hoppers and Their Natural Enemies written by R.C.L. Perkins and published by . This book was released on 1905 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leafhoppers And Their Natural Enemies written by Bangalore PDBC and published by . This book was released on 1993 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaf hoppers and Their Natural Enemies By R C L Perkins written by and published by . This book was released on 1905 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaf Hoppers and Their Natural Enemies written by R.C.L. Perkins and published by . This book was released on 1905 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leaf hoppers and Their Natural Enemies written by George Willis Kirkaldy and published by . This book was released on 1906 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of Life Histories of Leafhoppers of Maine Classic Reprint written by Herbert Osborn and published by Forgotten Books. This book was released on 2018-03-19 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Studies of Life Histories of Leafhoppers of Maine Its presence in meadows is almost universal and while it is not so abundant here as some of the other species probably because of its migration to adjacent grain fields, it must be counted as a constant drain especially in meadows of several years standing. On account of its numerous broods rapid development of the nymphs and ready flight of the adults it is more rapidly distributed into new fields than most of our meadow species and consequently rotation may not be as effec tive in its control. As a pest of oats it is one of the most conspicuous in its at tack oi any of the oat-feeding species although its work is very easily mistaken for that of plantlice or thrips. In Maine the attack on oats begins almost as soon as the plants are above ground when their succulent character is evidently a distinct attraction to the leafhopper and at this time adults may be swept in numbers from oat fields especially if they are adja cent to old meadows. It is possible that there are two brood here before the ripening of the crop but we have complete evi dence of the development of one generation both by rearing on plants in cages and by field observation This generation begins with egg depositions in the oat leaves in early July as detailed under life history and matures by the middle of Au gust or before the ripening of the grain and is then ready for flight to fields of more succulent character than the oat stubble. 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.
Download or read book Life Histories of Leafhoppers of Maine Classic Reprint written by Herbert Osborn and published by Forgotten Books. This book was released on 2017-06-17 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Life Histories of Leafhoppers of Maine The most evident effect is the production of numerous spots on the leaves these spots being at first whitish then turning to yellow then to brown and later to black often a black or brown center being surrounded by a reddish or yellow border and verv much resembling a fungus affected spot. This resemblance is SO great that the presence of fungi has often been suspected and efforts made to determine it. In fact I have often been in doubt whether certain spots could be charged to insect attack or fungus and have hesitated to assign the injury to the insect. The presence of eggs in the infested leaves or the demonstra tion of punctures where the hoppers have been sucking the plant cells however will leave no question as to the cause. Prof. Morse of this station who has made careful studies of these injuries states that he has been unable to find fungi present ii connection with the spots except late in the season and when they may very probably have followed as a sequence of the hopper punctures. The egg punctures and the feeding punctures are different enough so that they usually may be distinguished with the aid of a lens and the egg punctures do not as a rule show the color ing which follows the punctures and sucking of sap where the insects feed. The eggs are deposited mainly in the upper part of the leaf sheath or close to the stem on the basal part of the leaf blade. They are forced in beneath the epidermis usually close to the under epidermis but not through it and thus lie in the layer of cells between the two epidermal surfaces of the leaf The result is a transparent spot that is usually quite apparent especially if the leaf is held up to the light. 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.
Download or read book Natural Enemies written by Ann E. Hajek and published by Cambridge University Press. This book was released on 2004-02-12 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Description
Download or read book Natural Enemies of Green Leafhoppers Nephotettix Spp written by Omar Mohd. Yusof and published by . This book was released on 1991 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Beet Leafhopper Classic Reprint written by James Robert Douglass and published by Forgotten Books. This book was released on 2018-01-09 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Beet Leafhopper The beet leafhopper is a serious menace to sugar beet, bean, tomato, and other crops in the West, not because of direct damage by feeding, but because it transmits curly top disease. It is the only known carrier of this disease, which attacks many important agricultural crops, ornamental plants, and weeds. A sun-loving, dry-land insect, the leafhopper breeds in vast areas of weeds that have grown up on abandoned farmlands and deteriorated range. The misuse of land and the appearance of new weeds have created large tracts in the West which serve as breeding grounds for the leafhopper and as reservoirs of the curly top virus. When the weed hosts mature and dry, the nymphs die, and the adults that have not already moved are forced to find new food plants. They often travel long distances with the help of the wind. Generally, however, the movement is from the desert or rangeland to adjacent cultivated areas. In the course of these movements cultivated crops are infected with curly top (fig. 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.
