Inhibitory effect of spice extracts on seed germination of Parthenium hysterophorus L.

Abstract

Laboratory based experiments were conducted to evaluate inhibitory effect of different spice extracts (2, 5, 10, 20% concentration) on seed germination of Parthenium hysterophorus L. Among the five spice extracts Syzigium aromaticum was found to be most effective in inhibiting the germination of parthenium seed, it caused 100% inhibition even in 2% concentration. Piper nigrum and Cinnamomum tamala completely restricted the germination of parthenium seed in 10 and 20% concentration. Inhibitory effect of 10 and 20% concentration of Allium sativum and Zingiber officinalis was more than that of 2 and 5%. Thus with increasing the concentration of spice extract inhibition in germination was also increased. Effectiveness of different spice extract on inhibition of seed germination of parthenium are as Syzigium aromaticum > Piper nigrum > Cinnamomum tamala > Zingiber officinalis > Allium sativum.