Application time, Clodinafop, Formulations, Phalaris minor, Resistance

Field experiments were conducted in three successive seasons (Rabi 2010–11, 2011-12 and 2012–13) to evaluate the efficacy of clodinafop-propargyl formulations (wettable powder and emulsifiable concentrate) applied as post-emergence against Phalaris minor in wheat crop. All formulations of herbicide reduced the density of Phalaris minor over the weedy check however treated plots yielded below than the state average yield of wheat crop. These new clodinafop formulations/brands failed to provide effective control of resistant P. minor prevailing in wheat field during all years, and gave only 27-32% control of Phalaris minor over the weedy check. These new formulations also yielded similar to clodinafop-p-propargyl applied as standard check. Per cent control of Phalaris minor was found to be reduced from 60 to 40% over unsprayed check with delay in application time of clodinafop from 35 to 60 DAS.