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  • Author or Editor: J.A. Mortensen x
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‘Liberty’ is a new red-fruited grape cultivar with resistance to Pierce’s disease, an essential character for successful grape production in Florida. The name ‘Liberty’ commemorates our nation’s bicentennial.

Open Access
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Abstract

‘Blanc Du Bois’ grape was released by the Univ. of Florida as a hybrid bunch grape for use in making premium white wine. It is early ripening, resistant to Pierce's disease (PD), and grows and fruits well on its own roots (Fig. 1). The name is in honor of Emile DuBois, an accomplished grape grower and winemaker in the Tallahassee, Fla. area, who emigrated from France in 1882. DuBois spearheaded viticultural and enological efforts in Florida for 20 years.

Open Access
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Abstract

‘Suwannee’ and ‘Conquistador’ are 2 new cultivars of bunch grape (Vitis X sp.) released by the University of Florida. Both are resistant to Pierce’s disease (PD), a major limiting factor to grape production in the South (6).

Open Access
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Abstract

The most successful grape growing areas of the world are those in which little rain falls during the ripening period of the fruit. Abundant rains during this period promote disease, cracking and rotting of berries, and watery grapes of inferior quality (39). In Florida the time of ripening for grapes is June to September, which is also the time of most frequent rainfall. Since Vitis vinifera L. is highly susceptible to the diseases that accompany summer rainfall, new disease-resistant cultivars are needed with fruiting characters competitive with V. vinifera. Sources of such resistance in Vitis are found in both subgenera: Muscadinia (muscadine type) and Euvitis (bunch type) (1).

Open Access

Abstract

‘Orlando Seedless’, the first seedless grape with resistance to Pierce’s disease (PD), has been released by the Univ. of Florida (Fig. 1). It was developed from the grape breeding program at the Agricultural Research and Education Center in Leesburg (3). ‘Orlando Seedless’ is productive and long-lived in Florida, and was unaffected by the recent cold winters in Florida (− 10°C) that killed citrus and damaged muscadine grapes (Vitis rotundifolia).

Open Access

Abstract

‘Welder’ is a bronze muscadine grape, Vitis rotundifolia Michx., developed by a private grape grower of that name in Lake County, Florida. ‘Welder’ is vigorous, high yielding, self fertile, and suitable for both wine and fresh fruit consumption (Fig. 1).

Open Access

Abstract

Increased berry size in response to GA3 applications occurs in most seedless grape cultivars. GA3 applications made between bloom and fruit set are generally most effective; however, the specific developmental stage at which optimum response occurs is different for each cultivar (4). Inhibition of seed development has been associated with prebloom applications of GA3 on a few cultivars of normally seeded Vitis vinifera L., but the response can be variable (2). Thus, extensive research on use of GA3 may be required for each new cultivar.

Open Access

Abstract

Some people consider muscadines as the most satisfactory of all fruits for the home garden in the south (1). An increasing interest in muscadine culture in Florida is indicated by growers who have planted them for commercial production, and by others who plan vineyards for the near future. Therefore, information on the performance of muscadine varieties in central Florida is valuable for potential growers, and for research and extension personnel.

Open Access

Abstract

‘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.

Open Access

Abstract

‘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.

Open Access