Brief extensions of curing and presprouting increased plant production from bedded sweetpotato
1992
Hall, M.R.
'Georgia Jet' and 'Jewel' sweetpotato (Ipomoea batatas L.) roots were cured (32 +/- 1C, 85% +/- 5% relative humidity (RH) for 7 days immediately after harvest and then subjected to 0, 4, 8, or 12 additional days of curing before storage (16 +/- 1C, 85% +/- 5% RH). Roots were presprouted (32 +/- 1C, 85% +/- 5% RH) for 0, 4, 8, or 12 days before bedding. Plant emergence of 'Georgia Jet' was accelerated with increasing duration of curing, but emergence of both cultivars was accelerated with increasing duration of short-interval presprouting. With increasing duration of extended curing, there was a nonlinear increase in the number of early and total 'Georgia Jet' plants. However, with increasing duration of presprouting, there was a linear increase in the number of early and total plants of both cultivars. Average weights of early and total 'Jewel' plants were higher than those of 'Georgia Jet' plants. Treatments did not influence deterioration of bedded roots or the number of sprouts remaining on roots of a cultivar after 9 weeks of plant harvest. However, 'Jewel' roots retained more sprouts than 'Georgia Jet' roots, possibly indicating greater capacity for continued production of plants from 'Jewel' than 'Georgia Jet' if additional plant harvests were conducted.
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