1. Cooperative Research Centre for Viticulture, P.O. Box 154, Glen Osmond, South Australia 5064, Australia; Department of Primary Industries—Mildura, P.O. Box 905, Mildura, Victoria 3502, Australia; Department of Primary Industries—Queenscliff, P.O. Box 114, Queenscliff, Victoria 3225, Australia; and Department of Primary Industries—Knoxfield, Private Bag 15, Ferntree Gully Delivery Centre, Ferntree Gully, Victoria 3156, Australia