journal of kerbala university

An experiment was conducted in Biology Department, College of Science , Kufa University . Samples were collected from Kufa river during December , 2004. The aim was to study the effect of different temperature regimes on growth parameters ( plant fresh and dry weights , number of branches and length ) of "Common Hornwort" that signal the starting point of weed control. Plant were subjected to different temperature ( 10 , 15 , 20 , 25 , 30 , 35 and 40 C˚) with three replicates. Results showed that 30 C˚ was the best temperature due to producing the highest values of measured growth parameters. Meanwhile , 10and 40 C˚ gave the lowest values for the above mentioned parameters.