Experiments under glasshouse and field conditions were carried out to examine the effect of ethephon and CCC on quality of tomato transplants cvs Early Urbana and Red Clode at The Isfahan University of Technologf. Treatment of tomato transplants cvs. Red Clode and Early Urbana with ethephon (2-Chioroethyiphosphonic acid) and CCC (2- Chioroethyltrimethyl ammonium chloride) at three unfolded leaves stage prior to pulling from glasshouse and in the field, improved quality of transplants. Ethephon and CCC applied at 50, 100 and 200 mg/L significantly decreased stem length but increased stem diameter when compared with untreated control. Ethephon at 50 and 100 mg/I. resulted transplants with more adventitious roots. Higher concentration of ethephon (200 mg/L) however, provided plants with massive adventitious roots, whereas CCC had little effect on root initiation in both uItivars. Other growth parameters of transplant such as water content and canopy architecture were also, improved by ethephon and CCC treatments, however, ethephon applied at 200 mg/L in both cvs proved to be more effective than other treatments.
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