AGRICULTURE W Second Edition a t s c h Second Edition k e • Managing Turfgrass Pests D e r n o e d e “Drs. Watschke, Dernoeden, and Shetlar are considered the ‘three tenors’ of turfgrass pest n • management; this second edition combines their unmatched expertise in the biology and S h management of turfgrass weeds, diseases, and insects. The up-to-date information presented in e t this second edition translates fundamental turfgrass science research into applicable turfgrass lar management solutions. ... should be in a reachable location on the shelf of every turfgrass and green industry practitioner.” Managing M —Michael Fidanza, Ph.D., The Pennsylvania State University a “One of the strengths of the book is that the authors then provide several concise suggestions for n managing the pest, encouraging the incorporation of appropriate cultural strategies that may enable a g the turf to withstand some pest pressure. ... [This book] should be considered a valuable addition Turfgrass Pests i to any turf manager’s reference library.” n g —Patricia Vittum, Ph.D., University of Massachusetts T u Written by three of the top professionals in the turfgrass field, Managing Turfgrass Pests, Second r Edition brings together hundreds of solutions and best practices to help you manage turfgrass f g weeds, diseases, and insects more effectively. Since the publication of the bestselling first edition, r advances in pest-resistant cultivars and pest control products have led to significant changes in the a ways pests are managed. This revised and updated second edition reinforces those tactics that are s s still relevant and covers new approaches. P e New in This Edition s t • Revised and updated descriptions of economically important turfgrass pests s • Revised and updated cultural approaches to turfgrass pest management S TThhoommaass LL.. WWaattsscchhkkee e c o • Revised and updated biological methods of turfgrass pest management n d PPeetteerr HH.. DDeerrnnooeeddeenn E • Revised and updated chemical control of turfgrass pests d i t • More than 200 new color illustrations io DDaavviidd JJ.. SShheettllaarr n K15349 6000 Broken Sound Parkway, NW Suite 300, Boca Raton, FL 33487 711 Third Avenue New York, NY 10017 an informa business 2 Park Square, Milton Park www.taylorandfrancisgroup.com Abingdon, Oxon OX14 4RN, UK www.crcpress.com K15349_cover.indd 1 3/15/13 11:17 AM Second Edition Managing Turfgrass Pests Second Edition Managing Turfgrass Pests Thomas L. Watschke Peter H. Dernoeden David J. Shetlar Boca Raton London New York CRC Press is an imprint of the Taylor & Francis Group, an informa business CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2013 by Taylor & Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group, an Informa business No claim to original U.S. Government works Version Date: 20130226 International Standard Book Number-13: 978-1-4665-5508-2 (eBook - PDF) This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the author and publisher cannot assume responsibility for the validity of all materials or the consequences of their use. The authors and publishers have attempted to trace the copyright holders of all material reproduced in this publication and apologize to copyright holders if permission to publish in this form has not been obtained. If any copyright material has not been acknowledged please write and let us know so we may rectify in any future reprint. Except as permitted under U.S. Copyright Law, no part of this book may be reprinted, reproduced, transmit- ted, or utilized in any form by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying, microfilming, and recording, or in any information storage or retrieval system, without written permission from the publishers. For permission to photocopy or use material electronically from this work, please access www.copyright. com (http://www.copyright.com/) or contact the Copyright Clearance Center, Inc. (CCC), 222 Rosewood Drive, Danvers, MA 01923, 978-750-8400. CCC is a not-for-profit organization that provides licenses and registration for a variety of users. For organizations that have been granted a photocopy license by the CCC, a separate system of payment has been arranged. Trademark Notice: Product or corporate names may be trademarks or registered trademarks, and are used only for identification and explanation without intent to infringe. Visit the Taylor & Francis Web site at http://www.taylorandfrancis.com and the CRC Press Web site at http://www.crcpress.com Contents Preface to the Second Edition ...........................................................................xvii Preface to the First Edition .................................................................................xix Authors .................................................................................................................xxi 1. Weeds and Their Management ....................................................................1 Introduction ......................................................................................................1 Managing Turfgrass Weeds ...........................................................................1 Weeds as Indicators ....................................................................................2 Natural Reasons for Voids .........................................................................3 Management Reasons for Voids ................................................................3 Steps in Weed Control Strategy ................................................................3 Managing Summer Annual Grasses .............................................................4 Crabgrass ......................................................................................................5 Description ..............................................................................................5 Cultural Strategies ..................................................................................6 Goosegrass ...................................................................................................7 Description ..............................................................................................7 Cultural Strategies ..................................................................................7 Foxtail ...........................................................................................................8 Description ..............................................................................................8 Cultural Strategies ..................................................................................8 Barnyardgrass ..............................................................................................9 Description ..............................................................................................9 Cultural Strategies ..................................................................................9 Fall Panicum ..............................................................................................10 Description ............................................................................................10 Cultural Strategies ................................................................................10 Dallisgrass ..................................................................................................11 Description ............................................................................................11 Cultural Strategies ................................................................................11 Managing Winter Annual Grasses ..............................................................12 Poa annua ....................................................................................................13 Description ............................................................................................13 Cultural Strategies ................................................................................14 Managing Perennial Grasses and Sedges ..................................................15 Creeping Bentgrass ...................................................................................15 Description ............................................................................................15 Cultural Strategies ................................................................................15 Tall Fescue ..................................................................................................16 Description ............................................................................................16 © 2008 Taylor & Francis Group, LLC v vi Contents Cultural Strategies ................................................................................17 Orchardgrass .............................................................................................17 Description ............................................................................................17 Cultural Strategies ................................................................................18 Quackgrass .................................................................................................18 Description ............................................................................................18 Cultural Strategies ................................................................................18 Rough Bluegrass ........................................................................................19 Description ............................................................................................19 Control Strategies .................................................................................20 Nimblewill .................................................................................................20 Description ............................................................................................20 Cultural Strategies ................................................................................21 Bermudagrass ............................................................................................21 Description ............................................................................................21 Cultural Strategies ................................................................................21 Zoysiagrass ................................................................................................23 Description ............................................................................................23 Cultural Strategies ................................................................................23 Nutsedge ....................................................................................................23 Description ............................................................................................23 Cultural Strategies ................................................................................24 Managing Summer Annual Broadleaf Weeds ..........................................25 Oxalis ..........................................................................................................25 Description ............................................................................................25 Cultural Strategies ................................................................................26 Knotweed ...................................................................................................26 Description ............................................................................................26 Cultural Strategies ................................................................................27 Prostrate Spurge ........................................................................................28 Description ............................................................................................28 Cultural Strategies ................................................................................28 Purslane ......................................................................................................29 Description ............................................................................................29 Cultural Strategies ................................................................................29 Lambsquarters ...........................................................................................30 Description ............................................................................................30 Cultural Strategies ................................................................................31 Puncturevine .............................................................................................31 Description ............................................................................................31 Cultural Strategies ................................................................................31 Cultural Strategies ................................................................................32 Carpetweed ................................................................................................32 Description ............................................................................................32 Cultural Strategies ................................................................................32 © 2008 Taylor & Francis Group, LLC Contents vii Florida Pusley ............................................................................................32 Description ............................................................................................32 Cultural Strategies ................................................................................33 Managing Winter Annual Broadleaf Weeds .............................................33 Common Chickweed ................................................................................34 Description ............................................................................................34 Cultural Strategies ................................................................................35 Henbit .........................................................................................................35 Description ............................................................................................35 Cultural Strategies ................................................................................35 Shepherd’s Purse .......................................................................................35 Description ............................................................................................35 Cultural Strategies ................................................................................37 Corn Speedwell .........................................................................................37 Description ............................................................................................37 Cultural Strategies ................................................................................37 Bedstraw .....................................................................................................38 Description ............................................................................................38 Cultural Strategies ................................................................................38 Managing Biennials .......................................................................................39 Yellow Rocket ............................................................................................39 Description ............................................................................................39 Cultural Strategies ................................................................................40 Wild Carrot ................................................................................................40 Description ............................................................................................40 Cultural Strategies ................................................................................41 Black Medic ................................................................................................41 Description ............................................................................................41 Cultural Strategies ................................................................................42 Managing Perennial Broadleaf Weeds .......................................................42 Wild Garlic .................................................................................................43 Description ............................................................................................43 Cultural Strategies ................................................................................44 Dandelion ...................................................................................................44 Description ............................................................................................44 Cultural Strategies ................................................................................44 White Clover ..............................................................................................45 Description ............................................................................................45 Cultural Strategies ................................................................................45 Common Plantain .....................................................................................46 Description ............................................................................................46 Cultural Strategies ................................................................................47 Buckhorn Plantain ....................................................................................47 Description ............................................................................................47 Cultural Strategies ................................................................................48 © 2008 Taylor & Francis Group, LLC viii Contents Mouse-Ear Chickweed .............................................................................48 Description ............................................................................................48 Cultural Strategies ................................................................................48 Ground Ivy .................................................................................................49 Description ............................................................................................49 Cultural Strategies ................................................................................49 Sheep Sorrel ...............................................................................................50 Description ............................................................................................50 Cultural Strategies ................................................................................50 Canada Thistle ...........................................................................................50 Description ............................................................................................50 Cultural Strategies ................................................................................51 Chicory .......................................................................................................51 Description ............................................................................................51 Cultural Strategies ................................................................................52 Curly Dock .................................................................................................52 Description ............................................................................................52 Cultural Strategies ................................................................................53 Bull Thistle .................................................................................................53 Description ............................................................................................53 Cultural Strategies ................................................................................53 Heal All .......................................................................................................54 Description ............................................................................................54 Cultural Strategies ................................................................................54 Ox-Eye Daisy ..............................................................................................54 Description ............................................................................................54 Cultural Strategies ................................................................................55 Hawkweed .................................................................................................56 Description ............................................................................................56 Cultural Strategies ................................................................................56 Thyme-Leaf Speedwell .............................................................................57 Description ............................................................................................57 Cultural Strategies ................................................................................57 Creeping Speedwell ..................................................................................57 Description ............................................................................................57 Cultural Strategies ................................................................................58 Wild Violet .................................................................................................58 Description ............................................................................................58 Cultural Strategies ................................................................................59 Stitchwort ...................................................................................................59 Description ............................................................................................59 Cultural Strategies ................................................................................60 Cinquefoil ...................................................................................................60 Description ............................................................................................60 Cultural Strategies ................................................................................61 © 2008 Taylor & Francis Group, LLC