Transgenic Approaches to Disease Resistance in Ornamental Crops

John Hammond, Hei-Ti Hsu, Qi Huang, Ramon Jordan, and Kathryn Kamo are af­ filiated with USDA-ARS, U.S. National Arboretum, Floral and Nursery Plants Re­ search Unit, 10300 Baltimore Avenue, Beltsvillc, MD 20705.