Abstract
Abstract In field plantings, root pieces of ‘Centennial’, ‘Julian’, and ‘Jewel’ sweet potato (Ipomoea batatas L.) treated with (2-chloroethyl)phosphonic acid (ethephon) sprouted earlier than controls. Ethephon treatments increased the number of sprouts on ‘Centennial’ root pieces. In some tests, ethephon treated root pieces had increased yields of storage roots. Gibberellic acid (GA) increased the number of sprouts per root piece but did not influence the percentage of sprouted root pieces. GA promoted the growth of enlarged root pieces with few storage roots.
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