Performanceof Different Herbicidesfor Control of Congress Grass (Parthenium hysterophorus L.) in Non-cropped Areas

Metribuzin at 1000 and 1500 g ha⁻¹ gave 100% control of flowered as well as nonflowered Panhenium plants, followed by 50–60% with glyphosate at 1000 and 1500 g ha⁻¹. Non-flowered (vegetatively active growing) plants were comparatively more sensitive to these herbicides than the flowered plants. 2, 4-D ethyl ester (EE) at 1000 g ha⁻¹ resulted in 40% more mortality of non-flowered Parthenium plants than 2, 4-D Na salt. Chlorimuronethyl was inferior to other herbicide treatments in reducing growth of Parthenium.