F. Alsaqri et Pg. Alderson, EFFECTS OF IBA, CUTTING TYPE AND ROOTING MEDIA ON ROOTING OF ROSA-CENTIFOLIA, Journal of Horticultural Science, 71(5), 1996, pp. 729-737
Treatment of semi-hardwood cuttings of Rosa centifolia with the auxin
indolebutyric acid (TEA) was found to promote rooting. Percentage root
ing, root number and root length were enhanced when cuttings were trea
ted with 3500 ppm IBA in a 0.03% solution of potassium hydroxide. Medi
al and basal cuttings gave a better rooting response than apical and s
ub-apical cuttings, suggesting that cutting origin may be important fo
r the rooting performance of this species. Rooting percentage and root
length appeared to be improved if cuttings were planted in peat:perli
te:vermiculite medium as compared with peat:perlite or vermiculite alo
ne. The interaction between IBA concentration, cutting type and media
was found to enhance rooting percentage and root number but not root l
ength.