Seasonal rooting behaviour of cuttings of plum cultivars as influenced by IBA treatments

The response to IBA treatments in different planting seasons of four plum cultivars, as measured by rooting and field establishment, was investigated during 1986 and 1987. Among the four cultivars, ‘Santa Rosa’ gave the largest rooting percentage, number of primary and secondary roots per cutting, length and diameter of roots and field survival. The European cultivars ‘Greengage’ and ‘Early Transparent Gage’ showed poor rooting and field establishment. The cuttings planted during summer under mist gave better rooting and field establishment than dormant season- or autumn-planted cuttings. Similarly, IBA treatment of cuttings with 2000 mg l^?1 during summer and 3000 mg l^?1 during dormant and autumn seasons gave the largest rooting and survival percentages, high numbers of primary and secondary roots per cutting, and greater length and diameter of primary roots.