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 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 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 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 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 Leafhoppers and Their Natural Enemies written by S. P. Singh 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 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 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 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 Leafhoppers written by Andrew Hipp and published by The Rosen Publishing Group, Inc. This book was released on 2002-12-15 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to the life cyle and habits of the leafhopper.
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 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 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 Leafhoppers Hemiptera written by Daniel Bliss and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The challenge of modern agriculture is producing sufficient food for a large population while combating the adverse effects of climate change. These effects are likely to be many and varied, including increases in temperature, greater unpredictability of extreme weather, and expanded ranges of agricultural pests. The task of researchers is to find sustainable solutions to these problems while keeping farms economically profitable. This thesis examines the threat posed by specific insect pests to dairy crop production, with the goal of identifying effective and sustainable management solutions for each pest. To do this I have split my thesis into three chapters, each of which examines an aspect of pest management in dairy cropping. In Chapter 1 of my thesis, I review methods of controlling leafhopper populations in dairy cropping systems. Leafhoppers (Hemiptera: Cicadellidae) are major threats to agricultural production around the world. They are diverse, abundant, and capable of reducing crop quality and yield through feeding damage and vectored pathogens. While many studies have investigated the role of leafhoppers on individual crops, few have broadened their view to address the potential effects of leafhoppers on an industry. My review attempts to fill the gap in our understanding by examining the effects of leafhoppers on three of the largest acreage crops in the United States: alfalfa (Medicago sativa), maize (Zea mays), and soybean (Glycine max). Each of these crops contributes to the success of the dairy industry, the products of which have a major impact on the U.S. economy. Throughout the review I analyze leafhopper management strategies in each of these crops to identify which can contribute to successful production. In doing so I hope to shed light on the impact of leafhoppers in an important industry while providing a practical resource for researchers and growers. In Chapter 2, I track populations of a specific type of leafhopper--the potato leafhopper (PLH; Empoasca fabae)--in alfalfa/orchardgrass fields. PLH is a major threat to alfalfa production in the eastern regions of the United States, reducing crop quality and yield through feeding. To combat this pest, growers often rely on insecticides. While effective, these insecticides are expensive and damaging to the environment. Integrated Pest Management (IPM) was developed to reduce reliance upon pesticides in crop production while maintaining a focus on profitability and sustainability. While IPM has become a model for pest control, few studies have investigated its long-term benefits for insect management. Using data from four years of sampling, I studied PLH in alfalfa to compare a preemptive insecticide-based approach (i.e., conventional strategy) to an IPM-based approach (i.e., innovative strategy) in terms of insect control and profitability. My goal was to identify whether an innovative strategy could compete with a conventional strategy in terms of crop quality, crop yield, and insect management. I found that the innovative strategy produced similar quality to the conventional strategy while requiring less than half the number of insecticide applications and a lower per-plot cost. Despite a decreased cost per plot, the innovative strategy hosted a larger population of PLH and produced a lower total annual crop yield (though only in the second year of alfalfa growth). These results prompted me to test the effectiveness of PLH-resistant alfalfa to see whether it is a benefit or hinderance to alfalfa production. I found that PLH-resistant alfalfa reduced potato leafhopper population size by approximately 26% but did not significantly influence alfalfa quality or yield. This study demonstrates the values and costs of IPM in growing alfalfa and provides evidence that an innovative management strategy can be competitive with insecticide-based management programs. Chapter 3, I attempt to find a solution to PLH damage in alfalfa by promoting spider-mediated biological control. Biological control is a foundational aspect of IPM that uses predators and parasitoids to naturally reduce pest populations in agricultural fields. While biological control is effective in many situations, not every crop system has a suitable natural enemy for its suite of pests. As generalist predators, spiders have potential to act as effective biological control agents across a diverse range of crops and pests. Previous research has often neglected spiders, particularly foliage-dwelling spiders, in biological control because their populations tend to be low in agricultural fields. To assess the control potential of spiders, I focused on alfalfa and its most damaging pest in Pennsylvania, PLH. As tall structures tend to intercept ballooning spiders (a common form of travel) and improve their prey capture through superior web-building, I tested the influence of vertical structure on spider populations in an alfalfa/orchardgrass field. I used a factorial design which crossed two factors, bamboo stakes (non-living structure) and sorghum sudangrass (SS; living structure) to produce four treatments: stakes, SS, stakes + SS, and the control (no structure added). I included both living and non-living structures to identify whether structure type influenced spider populations. I sampled spiders using sweep-netting and pitfall traps to capture both foliage-dwelling and ground-dwelling populations. My results showed that vertical structure significantly increased populations of foliage-dwelling spiders. To identify the influence of spiders on pest populations, I used sweep-nets to capture PLH. I caught significantly fewer PLH in plots which contained both types of vertical structure. When comparing spider and PLH numbers, my results revealed a trend toward more effective PLH control by living structure, but no statistically significant difference.
Download or read book Friends of the Rice Farmer written by B. M. Shepard and published by Int. Rice Res. Inst.. This book was released on 1987 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction; Predators; Parasites; Pathogens.
