Ornamental Plants Ornamental Plants Annual Reports and Research Reviews 2004 Annual Reports and Research Reviews 2004 Annual Reports and Research OARDC Special Circular 19 OARDC Special Circular January 2005 Ohio Agricultural Research and Development Center Special Circular 195 In Partnership With Ohio Agricultural Research and Development Center Ohio State University Extension 5 In Partnership With Ohio State University Extension College of Food, Agricultural, and Environmental Sciences and the OSU Extension Centers at Wooster and Piketon The information in this publication is supplied with the understanding that no discrimination is intended and no endorsement by The Ohio State University; the College of Food, Agricultural, and Environmental Sciences; the Ohio Agricultural Research and Development Center; or Ohio State University Extension is implied. Due to constantly changing laws and regulations, no liability for the recommendations can be assumed. All publications of the Ohio Agricultural Research and Development Center are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability, or Vietnam-era veteran status. 1-2005-jaf Steven A. Slack Director The Ohio State University Ohio Agricultural Research and Development Center Ohio Agricultural Research and Development Center 1680 Madison Avenue 1680 Madison Avenue Wooster, Ohio 44691-4096 Wooster, Ohio 44691-4096 330-263-3700 330-263-3700 In Partnership With Copyright © 2005, The Ohio State University Ohio Agricultural Research and Ohio State University Extension Development Center. College of Food, Agricultural, and Environmental Sciences Ornamental Plants Annual Reports and Research Reviews 2004 Edited By James A. Chatfield Erik A. Draper Hannah M. Mathers Pamela J. Bennett Joseph F. Boggs David E. Dyke Ohio Agricultural Research and Development Center Ohio State University Extension Department of Horticulture and Crop Science The Ohio State University January 2005 Special Circular 195 Ohio Agricultural Research and Development Center In Partnership With Ohio State University Extension and the OSU Extension Centers at Wooster and Piketon Plants shown on the covers are from the Ohio Nursery and Landscape Association (ONLA) publications Landscape Plants for Ohio and Perennial Plants for Ohio, which were developed in 2004 through the partnership of ONLA and the Ohio State University Extension Nursery Landscape and Turf Team (see the article on page 34). Salaries and research support were provided by state and federal funds appropriated to the Ohio Agricultural Research and Development Center and Ohio State University Extension of The Ohio State University’s College of Food, Agricultural, and Environmental Sciences. Additional grant support was provided by the organizations and companies listed in the individual research and Extension reports. The use of trade, firm, or corporation names in this publication is for the information and convenience of the reader. Such use does not constitute an official endorsement or approval by the United States Department of Agriculture, the Agricultural Research Service, The Ohio State University, or the Ohio Agricultural Research and Development Center of any product or service to the exclusion of others that may be suitable. 2 The Ohio State University/Ohio Agricultural Research and Development Center Contents 1 ~ Ohio State University Extension Nursery, Landscape, 7 and Turf Team Directory: 2005 Jack Kerrigan and Gary Y. Gao 2 ~ Floriculture Industry Roundtable of Ohio 16 Charles T. Behnke and Claudio C. Pasian 3 ~ Ohio State University Extension 2004 Buckeye Yard & 22 Garden Line Evaluation Survey Amy K. Stone and James A. Chatfield 4 ~ Teamwork Is Its Own Reward 27 James A. Chatfield, Joseph F. Boggs, Gary Y. Gao, Erik A. Draper, Keith L. Smith, Barbara G. Ludwig, and Stephen R. Baertsche 5 ~ Landscape Plants and Perennial Plants for Ohio 34 Timothy J. Malinich, William F. Hendricks, Jane A. Martin, Pamela J. Bennett, Jennifer Gray, Erik A. Draper, Kenneth Chamberlain, Fred Hower, Joseph F. Boggs, Kenneth D. Cochran, Jack Kerrigan, Daniel A. Herms, Curtis E. Young, Larry G. Steward, David E. Dyke, and James A. Chatfield 6 ~ Weather Summary and Environmental Problems 36 of Ornamental Plants in Ohio: 2004 Pamela J. Bennett 7 ~ Insect and Mite Activity Noted in Ohio Nurseries 43 and Landscapes: 2004 Joseph F. Boggs, Barbara Bloetscher, David J. Shetlar, Curtis E. Young, Amy K. Stone, Pamela J. Bennett, Erik A. Draper, David J. Goerig, Timothy J. Malinich, David E. Dyke, and James A. Chatfield 8 ~ Summary of Diseases of Landscape Plants in Ohio: 2004 60 James A. Chatfield, Nancy A. Taylor, Erik A. Draper, Amy K. Stone, Gary Y. Gao, David J. Goerig, Joseph F. Boggs, Curtis E. Young, and David E. Dyke 9 ~ Performance of Five Ornamental Crabapples (Malus sp.) 71 on Seven Size-Controlling Rootstocks D. C. Ferree, J. C. Schmid, and K. D. Cochran The Ohio State University/Ohio Agricultural Research and Development Center 3 10 ~ New and Difficult Weeds in Ohio Nurseries 77 Hannah M. Mathers and Randall H. Zondag 11 ~ Retracting Statements: Tree Liner Production 80 in Retractable-Roof Greenhouses (RRGs) Hannah M. Mathers, Dan Struve, Alison Stoven, Dale Hammersmith, and Tom Demaline 12 ~ Ohio Battles the Borer: An Emerald Ash Borer Update 85 Amy K. Stone, Daniel A. Herms, and Melissa Brewer 13 ~ The Viburnum Leaf Beetle in Ohio 92 Curtis E. Young 14 ~ Cicada Mania Hits the Eastern United States 96 Curtis E. Young, Joseph F. Boggs, and David J. Shetlar 15 ~ Gypsy Moth in Ohio 101 David Adkins, Amy K. Stone, and Daniel A. Herms 16 ~ Biological Calendars: The Statewide Network 111 of OSU Phenology Gardens Denise Ellsworth and Daniel A. Herms 17 ~ The Evaluation of Insecticides for Control 116 of the Hairy Chinch Bug in Ohio Lawns David J. Shetlar, Jennifer Andon, and Daniel Digman 18 ~ The Evaluation of Fungicides for the Curative Control 123 of Red Thread (Laetisaria fuciformis) in Kentucky Bluegrass (Poa pratensis) Joseph W. Rimelspach, T. E. Hicks, and Michael J. Boehm 19 ~ The Evaluation of Fungicides for the Management 125 of Red Thread (Laetisaria fuciformis) in Perennial Ryegrass (Lolium perenne) Joseph W. Rimelspach, T. E. Hicks, and Michael J. Boehm 20 ~ Sudden Oak Death: Monitoring Phytophthora ramorum 127 in the North Central United States Frances S. Ockels, Manfred Mielke, and Pierluigi Bonello 4 The Ohio State University/Ohio Agricultural Research and Development Center 21 ~ Application of Imidacloprid Through Drip Irrigation 131 for Control of White Grubs in Field-Grown Nursery Crops Michael E. Reding, Heping Zhu, and Randall H. Zondag 22 ~ Preliminary Investigation of Water and Nutrient Use, 135 Substrate Temperature, and Moisture in Pot-in-Pot Production Heping Zhu, Randall H. Zondag, Charles R. Krause, Richard C. Derksen, and Tom Demaline 23 ~ Ohio State Learning Gardens 2004 Annual Flower Trials, 145 Columbus Campus Monica Kmetz-González and Claudio Pasian 24 ~ The Ohio State University Learning Gardens 160 Pansy/Viola Cultivar Trial, 2003 - 2004 Monica Kmetz-González and Claudio Pasian 25 ~ Ohio State University Extension Gateway Learning Gardens 176 2004 Herbaceous Ornamental Field Trial Results Pamela J. Bennett 26 ~ Results of Herbaceous Annual Plant Trial Gardens 187 at the Cincinnati Zoo and Botanical Garden, 2004 David E. Dyke and Steve Foltz 27 ~ Apple Scab on Crabapple at Secrest Arboretum: 2004 189 Erik A. Draper, James A. Chatfield, Daniel A. Herms, and Kenneth D. Cochran 28 ~ How Mighty Is the Oak: Oaks for the Midwest Landscape 193 Kenneth D. Cochran 29 ~ 10 Things You Should Know About Lichens 204 David J. Goerig and James A. Chatfield 30 ~ The 20 Questions of Plant Problem Diagnostics 210 James A. Chatfield, Joseph F. Boggs and Erik A. Draper 31 ~ The Lake County Nursery IPM Program 221 Randall H. Zondag, Daniel A. Herms, Charles R. Krause, Heping Zhu, Michael E. Reding, Ross D. Brazee The Ohio State University/Ohio Agricultural Research and Development Center 5 32 ~ Useful Horticulture References for Green Industry 224 Professionals Pamela J. Bennett and Gary Y. Gao 33 ~ Lessons Learned at the MIDPAC Horticultural Expo 226 and Hawaii Export Nursery Association (HENA) Conference Charles T. Behnke and Harold H. Kneen 6 The Ohio State University/Ohio Agricultural Research and Development Center ~ 1 ~ Ohio State University Extension Nursery, Landscape, and Turf Team Directory: 2005 Our Vision and the mission of the team. Potential members are encouraged to participate in The vision of the Extension Nursery, some of our activities to determine if they Landscape, and Turf Team is to serve as would like to become a part of our team. If the University’s partner with the green you are interested in the work of the team, industry to position us for the future. please contact any of the team members. The ENLT Team greatly appreciates the Our Mission significant funding support of the Ohio The mission of the Extension Nursery, Nursery and Landscape Association. Landscape, and Turf Team, through our interdisciplinary and industry partnerships, is to improve the process Team Members of acquisition, delivery, and support of Betsy Anderson accurate, practical, and timely educational resources. • Ornamental plant pesticide research (IR-4 Program) • Biological pest control An Invitation • Identification of nursery, greenhouse, Membership on the team is based on and landscape pesticide needs interest and commitment to the vision • Registration