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Introduction

The Metropolitan Tree Improvement Alliance (METRIA), in conjunction with the International Ornamental Crabapple Society, held
its eighth conference on June 22-25, 1994 at the U.S. National Arboretum. This document intends to not only convey conference presentations in an accessible text version, but also demonstrate the quality and quantity of information available through the METRIA organization.

Unfortunately, the proceedings are unable to capture the camaraderie experienced by the attendees nor the knowledge they gained from the ‘Trees of the U.S. Capitol Grounds” or “Stressful Sites of the Nation’s Capital” tours. Simply put, it was a good time
had by one and all!

Acknowledgements

The METRIA officers wish to express our most sincere appreciation to the National Arboretum staff for their genuine hospitality and
flawless arrangements. Their work on our behalf helped to ensure another successful gathering. We also want to thank the U.S. Forest Service far again agreeing to provide financial support.

• Introduction and Acknowledgements
• Plant Exploring in China - Peter Briston, Holden Arboretum
• Results of the National Crabapple Evaluation Program - Tom Green, Western Illinoios University
• Hybridizaton of the Large-Bracted Dogwoods - Elwin Orton, Rutgers University
• Susceptibility of Cornus Kousa Cultivars and Hybrids to Anthracnose and Powdery Mildew - Tom Ranney, North Carolina State University
• A Novel Method of Cultivar Evaluation - The Schmidt Trial Pack - Keith Warren, J. Frank Schmidt and Son Nursery
• Bacterial Leaf Scorch of Urban Trees - Jim Shrald, National Park Service
• Evaluation of Some Little-Known Asian Elms for Urban Use - George Ware, Morton Arboretum
• Dutch Elm Disease Resistance in Progeny from Interspecific Crosses with Chinese Elm (Ulmus Parvifolia) - Ray Guries and Gene Smalley, University of Wisconsin
• Variation in Elm Leaf Miner Injury on Elm Species and Hybrids in Wisconsin - Ray Guries and Gene Smalley, University of Wisconsin
• Cold Hardiness of Crabapple and Pear Cultivars - Harold Pellet and Steve McNamara, University fo Minnesota Landscape Arboretum
• Identification of Crabapple Cultivars by Isozymes - Bob Marquard, Holden Arboretum
• Cold Hardiness of Pyrus Calleryana Cultivars Not Affected by Fall Transplanting - Heather L. McElroy and Henry D. Gerhold, School of Forest Resources, Penn State University
• Selecting Tatter and Scorch Resistant Sugar Maples - John C. Pair, Kansas State University
• Maackia and More: Research on Woody Ornamentals at Iowa State University - Anthony S. Aiello, Jeffery K. Iles and William R. Graves, Iowa State University
• Environmental Adaptation for Ornamental Value of Cornus Florida in a Michigan Provenance Test - R.C. Heatley, J.J. Kielbaso and G.S. Howell, Michigan State University
• Breeding Maples: Exploring the Possibilities for Combining Small Stature and Hardiness - Susan J. Wiegrefe, Department of Horticultural Science, University of Minnesota

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Updated January 20, 2010

This page was created by Thomas Eaker and Thomas Ranney, January 1998.