Abstract
Bromoethane was evaluated for its suitability to induce dormant tubers to sprout. Bromoethane immediately broke dormancy and caused multiple sprouting when applied to whole tubers as a vapor at 0.1 or 0.2 ml/L for 24 h at room temperature. Superficial and localized necrosis developed on the tubers if proper skin set had not occurred either in the field or after a curing period. In fall greenhouse trials, bromoethane treatment of whole tubers of the cultivars Red Pontiac, Russet Burbank, Bintje, Kennebec and Caribe induced them to sprout 40 to 70% earlier than untreated controls. Application of bromoethane significantly increased the mean rate of shoot elongation by 2.8 mm/day although there was no significant difference in its effect among the cultivars.
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