Abstract:
The aim of this study was to determine the effect and the optimal concentration of
sembung rambat and ketapang extract on the seed germination of weed, Asystasia
gangetica. This study used a Randomized Block Design with seven treatments i.e.
control (0%), 20%, 40%, 60% sembung rambat extract and 20%, 40%, 60% ketapang
extract. Each treatment was repeated three times. The observed data were analized using
Analysis of Variance (ANOVA) and followed by Duncan’s Multiple Range Test
(DMRT) at 5% level of significance. The results showed that all treatments inhibit the
germination of A. gangetica. The optimal inhibitory effect on weed germination was
showed by 40% of ketapang extract