| In this study, crude extract of Alpinia galangal (Linn.) Swartz was separated into 2 fractions by column chromatography. The seeds of 6 species of crops and weeds (Oryza sativa, Zea mays L., Arachis hypogaea, Brassica iboglabra, Praxellis clematidea and Echinachola colonum) were placed in media containing either fraction A or B at various concentrations of 1%, 3% and 5%. The percentages of germination and growth of each species were measured. Fraction A at 5% resulted in the highest inhibition of germination for Oryza sativa, Zea mays L., Arachis hypogaea and Brassica iboglabra. In contrast, the germination of Praxellis clematidea and Echinachola colonum was most inhibited on media containing fraction B at 5%. The growth of the leaf width and stem length... |
