STUDIES ON VEGETATIVE PROPAGATION. OF SOME STONE FRUIT ROOTSTOCKS

Abstract

Through two successive seasons (1995 and 1996) the ••• propagation of some peach rootstocks namely, Nemaguard, Flordaguard and Hansen was carried out using semi hardwood;•• hardwood cuttings and stoolbed layerings. Cuttings were :.;,_ treated with IJ3A at 0, 1000, 2000 or 4000 ppm either with or''''' without wounding. In each season semi hardwood cuttings '' ,• were prepared in July, August, September and October,,-._ whereas hardwood cuttmgs were prepared m November and • • •• December weither treated or untreated with storage for one ••• month. Layering were treated by IBA at 0, 2000 or 4000 ppm_.,: • with or without wounding in April and October. ; The following are the best rooting results which could ' •• • be obtained for each rootstock : l.Nemaguard rootstock : Medium semi hardwood cuttings collected in September or October and treated with I 000 or 2000 ppm IBA after wounding (30.0 and 27.5%

respectively). Medium hardwood cuttings collected in November and treated with 2000 or 4000 ppm IBA. followed or not followed by storage (30.0 and 72.5% respectively). Layerings treated with 2000 or 4000 ppm IBA after wounding in April (91.65 and 95% respectively). 2.Flordaguard rootstock : Medium semi hardwood and hardwood cuttings failed to root in both seasons. On the other hand layerings treated with 2000 or 4000 ppm IBA