Effect of Judicious Ethephon Application on Yield Response of Hevea Brasiliensis (Clone RRII 105) under 1/2S d/3 6d/7 Tapping System

摘要

Effects of different frequencies of stimulation with ethephon (2-CEPA ) on yield performance of Hevea brasiliensis (clone RRII 105) were evaluated in tapping blocks under 1/2S d/3 6d/7 system. A five-year study showed sustainable increase in dry rubber yield. Three to five stimulations per year resulted in 18% to 29% increase in yield. DRC did not show any major change due to the stimulation treatments imposed. Tapping panel dryness did not show any increase. Three rounds of stimulation in a year would give sustainable yield increase in clone RRII 105 under 1/2S d/3 6d/7 tapping system.