Miller, Julian C. Department of Horticulture, Louisiana State University, Baton Rouge, Louisiana.
Bouwkamp, John C. Department of Horticulture, College of Agriculture, University of Maryland, Baltimore, Maryland.
Nielson, Lowell W. Department of Plant Pathology, North Carolina State University, Chapel Hill, North Carolina.
- Production practices
- Subsistence agriculture
- Germplasm resources
- Related Primary Literature
- Additional Reading
Ipomoea batatas (order Solanales), a tropical vine having variously shaped leaves, purplish flowers, and a sweet, fleshy, edible tuberous root. The sweet potato (Fig. 1), occasionally spelled as one word (sweetpotato), was mentioned as being grown in Virginia as early as 1648. For much of the twentieth century, outstanding strains of the Porto Rico variety (in particular, Unit I Porto Rico) were prevalent in the United States. Today, the Unit I Porto Rico is being replaced by the Centennial, which is a yam type having a threefold vitamin A content. More than 70% of the commercial crop in the United States consists of the Centennial variety. Another variety, Nemagold, is used largely in the Virginia area because of its resistance to nematodes. Most present-day varieties have multiple disease resistance, particularly resistance to wilt and soil rot. See also: Horticultural crops; Solanales
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