Abstract
Length of dormancy limits the use of autumn-grown seed potatoes for planting the spring crop. Trials of different treatments for breaking dormancy were carried out for four successive seasons (1958–1961). Cutting the seed and dipping in gibberellic acid (GA) was effective in breaking dormancy. Cutting two weeks before planting and dipping the seed pieces in a 1 ppm GA solution gave the best results. Instead of cutting, smaller sized seed can be pierced, thus enabling the entire yield of tubers to be used for seed. Higher concentrations of GA induced growth abnormalities in both plants and tubers without producing any improvement in the breaking of dormancy over the lowest concentration used (1 ppm). Physiological aspects of seed potatoes are discussed.
Published Version
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