Abstract
SummaryHot water treatment (H.W.T.) at 57 °C for 30 min reduced the incidence of Fusarium in lightly infected flowering-sized gladiolus corms. Results were improved by soaking for 24 h before treatment but not by increasing the H.W.T. exposure time by 10 min.Damage to gladiolus corms was caused mainly by splitting that resulted from lateral bud growth this led to reduction in flower height, flower yield and corm size.Trials to increase corm hardiness to H.W.T. by previous storage at high temperatures showed that corms from different growing seasons responded differently. Storage at 35°C caused a breaking of dormancy and increased H.W.T. damage when applied to summer-grown gladioli; the same treatment applied to autumn-grown corms increased corm hardiness.Breaking of dormancy caused by storage at high temperatures was additional to that caused by H.W.T.
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