EFFECT OF HERBICIDES ON SHOOT AND ROOT GROWTH OF LAWNSiddappa, H.M. Vikash, K. M. Asha, K.V. Jayaprasad, G.K. Seetaramu and S. Anilkumar
Field experiment was conducted during the period from November to December, 2013 and February to March, 2014 to manage the sedge and broad leaf weeds in lawn. Experimental plot has red sandy loam soil with pH 6.50. The experimental plot consists of Bermuda grass which was established through turfing. Observations were recorded on shoot and root length of Cynodon dactylon before herbicide application, 20 and 60 days after application of herbicides. Shoot length were found to be higher in 2, 4-D dimethyl amine salt 58% EC at 10 ml/L of water 11.62 and 12.56 cm at 20 and 60 days after application of herbicides, respectively. Root length were found to be higher in 2, 4-D dimethyl amine salt 58% EC at 10 ml/L of water 8.11 and 14.09 cm at 20 and 60 days after application of herbicides, respectively. The growth of lawn grass was adversely affected by weeds in unweeded control due to heavy competition for nutrients, moisture, space and light leading to reduction in shoot, root growth and quality of lawn. The growth parameters like shoot and root length were found to be significantly higher in 2, 4-D dimethyl amine salt 58% EC at 10 ml/ L of water. The use of 2, 4-D, is a selective herbicide and acts as a plant growth regulator which mimics the natural plant growth hormone.
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