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Ornantental Plants Annual Reports and Research Reviews • 1998

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Ornantental Plants Annual Reports and Research Reviews • 1998 Ornantental Plants Annual Reports and Research Reviews • 1998 T·H·E T· H·E OHIO OHIO January 1999 Special Circular 165 m~ Ohio Agricultural Research and Development Center OARilL EXTENSION In Partnership With Ohio State University Extension T · H · E OHIO SfAlE UNIVERSITY OARilL Lowell R. Nault Interim Director Ohio Agricultural Research and Development Center 1680 Madison Avenue Wooster, Ohio 44691-4096 330-263-3700 Ornamental Plants Annual Reports and Research Reviews 1998 Edited By Mary Ann Rose and James A. Chatfield Ohio Agricultural Research and Development Center Ohio State University Extension Department of Horticulture and Crop Science The Ohio State University T · H · E T · H · E OHIO OHIO January 1999 Special Circular 165 srA1EUNIVERSITY SfA1E UNIVERSITY Ohio Agricultural Research and Development Center OARilL EXTENSION In Partnership With Ohio State University Extension 1 Cover Photo: Ken Cochran is shown among the umbrella magnolias (Magnolia tripetla) at the Secrest Arboretum on the Ohio Agricultural Research and Development Center's Wooster campus. 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 reports. 2 Contents Ohio State University Extension Nursery, Landscape, and Turf Team 7 Directory: 1999 Floriculture Industry Roundtable of Ohio: 1999 12 Ohio State University Extension Buckeye Yard and Garden Line 16 Gary Y. Gao, Pamela J. Bennett, Joseph F. Boggs, James A. Chatfield, David E. Dyke, Jane C. Martin, David J. Shetlar, and Randall H. Zondag Micronutrient Sources for Container Nursery Plants 21 Mary Ann Rose and Hao Wang Effects of Nursery Production Practices on the Growth, Insect Resistance, 26 and Stress Tolerance of 'Sutyzam' Crabapple in the Landscape John E. Lloyd, Daniel A. Herms, and Mary Ann Rose Floral Development and Potential for Interspecific Hybridization 32 of Aesculus parviflora and Aesculus pavia Ann Chanon and Pablo Jourdan Environmental and Cultural Problems of Ornamental Plants 37 in Ohio: 1998 Pamela J. Bennett and Jane C. Martin Insect and Mite Activity Noted in Ohio Nurseries and Landscapes: 1998 41 Joseph F. Boggs, David J. Shetlar, Jane C. Martin, Pamela J. Bennett, James A. Chatfield, and Gary Y. Gao Ornamental Disease Summary for Ohio: 1998 50 James A. Chatfield, Nancy J. Taylor, Joseph F. Boggs, Jane C. Martin, Gary Y. Gao, Pamela J. Bennett, Randall H. Zondag, and David E. Dyke Weed Problems in Ohio Turf, Landscapes, and Nurseries: 1998 55 Gary Y. Gao, Joseph F. Boggs, Pamela J. Bennett, Jane C. Martin, James A. Chatfield, Mary Ann Rose, Joseph W. Rimelspach, Randall H. Zondag, John R. Street, and William E. Pound 3 Summary of Turf Cultural and Disease Problems: 1998 59 Gary Y. Gao, Joseph F. Boggs, Pamela J. Bennett, Jane C. Martin, David E. Dyke, Joseph W. Rimelspach, Barbara Bloetscher, John R. Street, William E. Pound, and James A. Chatfield Wildlife Problems in Ohio Landscapes: 1998 63 Gary Y. Gao, Joseph F. Boggs, Jane C. Martin, Pamela J. Bennett, David E. Dyke, and James A. Chatfield Control of Nuisance and Detrimental Molds (Fungi) in Mulches 66 and Composts Harry A. J. Hoitink and M. S. Krause Understanding and Using Degree'.:"Days 70 Daniel A. Herms Plant and Insect Phenology in the Year of El Nifio: Comparison 77 with 1997 Daniel A. Herms Evaluation of Crabapples for Apple Scab at the Secrest Arboretum 89 in Wooster, Ohio: 1998 James A. Chatfield, Erik A. Draper, Kenneth C. Cochran, Peter W. Bristol, and Charles F. Tubesing Comprehensive Aesthetic Evalutions of Crabapples at Secrest Arboretum 94 in Wooster: 1993-1998 James A. Chatfield, Erik A. Draper, Kenneth D. Cochran, Peter W. Bristol, and David E. Allen Inkberry Leaf Miner, Phytomyza glabricola Kulp (Diptera: 105 Agromyzidae): Life Cycle in Ohio Adbulrahman A. K. Al-Siyabi and David J. Shetlar Growth of Ornamental Plants in Compacted Soils and Media 113 Michael Knee, Ruth A. Brake, Nicole D. Cavender, and Laura C. Thomas Postemergence Herbicide Efficacy on Crabgrass - 1997 120 John R. Street and Renee M. Stewart Important Considerations When Changing to a New Soil Testing 125 Laboratory Mary Ann Rose 4 Abstracts 128 Seasonal Patterns of Nutrient and Dry Weight Accumulation 128 in Freeman Maple Mary Ann Rose and Barbara Biemacka A Comparison of Micronutrient Sources for Container 128 Rhododendron Mary Ann Rose and Hao Wang Fertilizer Concentration and Moisture Tension Affect Growth 129 and Foliar N, P, and K of Two Woody Ornamentals Mary Ann Rose and Hao Wang CuSO4 Filters Influence Flowering of Chrysanthemum cv. Spears 129 Margaret McMahon Far-Red Absorbing Filters Influence Growth and Development 130 of Euphorbia pulcherrima "Glory' M. J. McMahon andJ. W. Kelly Irrigation Management Practices in Ohio 130 Cassandra C. Brown and Mary Ann Rose Expand Your Web of Knowledge: Internet Resources for the Green 131 Industry Ohio State University Publications Recommended for the Green 133 Industry 5 6 Ohio State University Extension Nursery, Landscape, and Turf Team Directory: 1999 Our Vision Team Members The vision of the Extension Nursery, Land­ scape, and Turf Team is to serve as the Charles Behnke University's partner with the green indus­ try to position us for the future. • Diagnosis of cultural problems of trees and shrubs • Weed identification • Insect identification Our Mission • Greenhouse management • Garden center employee training The mission of the Extension Nursery, • IPM Landscape, and Turf Team, through our interdisciplinary and industry partnerships, Extension Agent, Horticulture, Loram County 42110 Russia Road is to improve the process of acquisition, de­ Elyria, OH 44035-6815 livery, and support of accurate, practical, 440-322-0127 or 440-329-5350 and timely educational resources. 440-329-5351 Fax E-mail: [email protected] An Invitation Pam Bennett Membership on the team is based on inter­ • Consumer and environmental horticulture est and commitment to the vision and the • Garden center management mission of the team. Potential members are • Landscape ornamentals encouraged to participate in some of the • Landscape maintenance activities to determine if they would like to • Communications become a part of the team. Individuals who • Master Gardener Program are interested in the work of the team Extension Agent, Horticulture, Clark County should contact any of the team members. 4400 Gateway Blvd., Suite 104 Springfield, OH 45502-9337 937-328-4607 937-328-4609 Fax E-mail: Pl bennett@pos toffice .ag .ohio-s ta te .ed u Barbara Bloetscher • Turfgrass culture and diseases • Plant and weed identification • Herbicide damage on crops and ornamentals Directory developed by Jack Kerrigan, Ohio State • Homeowner herbicide information University Extension, Cuyahoga County. 7 Research Assistant, Department of Horticulture and 1680 Madison Avenue Crop Science Wooster, OH 44691-4096 236 Kottman Hall 330-263-3761 2021 Coffey Road 330-263-3713 Fax Columbus, OH 43210 E-mail: [email protected] 614-292-7457 614-292-7162 Fax E-mail: [email protected] Erik Draper • Diagnosis of plant problems (diseases, insects/ mites, cultural and environmental) Joe Boggs • Landscape maintenance • Ornamental entomology • IPM • Landscape management • Tree and small fruit management • Turf management • Tree nursery management Extension Agent, Horticulture, Geauga County • Urban forestry P.O. Box 387, 14269 Claridon-Troy Road • Diagnosis of plant problems Burton, OH 44021-0387 • IPM 440-834-4656 • Christmas tree production 440-834-0057 Fax E-mail: [email protected] Extension Agent, Horticulture, Hamilton County 11100 Winton Road Cincinnati, OH 45218-1199 David Dyke 513-825-6000 Ext. 14 • Horticultural marketing 513-825-6276 Fax E-mail: [email protected] Extension Agent, ANR/CD, Lawrence County 1 Veterans Square Jim Chatfield Ironton, OH 45638 740-533-4322 • Diagnosis of plant problems 740-533-4416 Fax • Plant disease control E-mail: [email protected] • Ornamental plant selection • Plant pest monitoring • IPM Denise Ellsworth • Pest diagnosis Northeast District Specialist, Horticulture • IPM in the landscape Assistant State Specialist, Landscape Horticulture • Master Gardener Program Northeast District Extension Office • Youth gardening, garden design, and teacher 1680 Madison Avenue training Wooster, OH 44691-4096 330-263-3831 Extension Agent, Horticulture and Environmental 330-263-3667 Fax Education E-mail: [email protected] Stark-Summit Regional Office 5119 Lauby Road Ken Cochran North Canton, OH 44720-1544 330-497-1611 • Taxonomy and classification of ornamental plants 330-497-2807 Fax • Plant selection for environmental enhancement E-mail: [email protected] • Landscape management • Nursery operations and management • Plant propagation Gary Gao • Tree fruits and small fruits Director, Secrest Arboretum, OSU /OARDC • Plant and soil nutrition Assistant Professor, OSU Agricultural Technical • Consumer horticulture Institute • Garden center employee training • Plant physiology 8 Extension Agent, Horticulture, Clermont County Plant Pathologist P. 0. Box 670, 1000 Locust Street USDA, Agricultural Research Service Owensville, OH 45160-0670 Department of Plant Pathology, OSU /OARDC 513-732-7070 1680 Madison Avenue 513-732-7060 Fax Wooster, OH 44691-4096 E-mail: [email protected] 330-263-3672 330-263-3841
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