Under conditions favoring Pierce’s disease (PD) infection in the vineyards at Leesburg, Florida, 222 Euvitis scion clones, 60 Muscadinia clones, and 49 Euvitis rootstock clones were grown and observed for PD symptoms for 8 or more years. There were 21 PD-resistant scion clones, 20 of which derived their resistance from 1 or more of 4 species: Vitis smalliana Bailey, V. simpsoni Munson, V. shuttleworthi House, and V. aestivalis Michx. There were 22 PD-resistant Muscadinia clones, predominantly of V. rotundifolia Michx. background. There were 15 Euvitis rootstock clones with resistance derived from one of six native species: V. candicans Engelm., V. champini Planch., V. cordifolia Michx., V. shuttleworthi, V. simpsoni, and V. smalliana.

‘Tampa’ grape (Vitis spp.) has been released because of its superiority to ‘Dog Ridge’ (1) and other rootstocks currently used in Florida. It has less tendency to sprout from below the graft union and induces greater growth and yield of scions.

‘Daytona’, a pink bunch grape (Vitis X sp.) recommended for fresh fruit consumption, has been released by the University of Florida Agricultural Experiment Station. ‘Daytona’ is resistant to Pierce’s disease (PD), has vini-fera-like fresh fruit character, and has larger bunch and berry size than other PD-resistant cultivars. ‘Daytona’ is suited to homeowner use in areas where PD is a limiting factor to grape growing.