Vol. 4, Issue 3 (2019)
Bread wheat is one of the chief food-grains worldwide. Cut in yield is consequence of its competition with weeds for soil nutrients & water at juvenile stages and reduced quality due to adulteration at harvest. Population density of weeds, their kind and intensity of weedicides used determine the magnitude of damage. Phalaris minor (Dumbi sitti) is being the notorious weed of wheat crop due to its preponderance and devastating nature. Insight of delinquent behavior of aforesaid weed, an experiment was conducted following RCBD with three replications to define the best dose of clodinafop propargyl i.e. 120g/acre, 130g/acre, 140g/acre. Additionally, comparative efficacy of clodinafop propargyl, fenoxaprop-p-ethyl and sulfusulfuron at their recomemded doses of 140g/acre, 500 ml/acre and 13.5 g/acre, respectively, were also tested to check phalaris minor (Dumbi sitti) attack during Rabi season 2016-17 and 2017-18. Maximum weed intensity (5.33 m-2) was pragmatic at dose 120 g/acre while least (2.00 m-2) was at 140 g/acre of clodinafop propargyl as compared to control (17.33 m-2). Lowest weed population of 1.67 m-2 when treated with Clodinafop propargyl (140 g/acre) followed by 2.33 m-2 and 3.67 m-2 in fenoxaprop-p-ehtyl (500ml/acre) and sulfosulfuron (13.5 g/acre), respectively were recorded along with 20.33 m-2 value of control. For quantitative characters, maximum value of Plant height (97.67 cm), No. of tillers/plant (282.67) and 1000-grain weight (42 g) was observed for clodinafop propargyl (140 g/acre). While, least Plant height (92.33cm), No. of tillers/plant (267.33) and 1000-grain weight (36 g) was noted for sulfosulfuron (13.5 g/acre) treatment. Whereas, values of 89.33 cm, 236.67 and 31 g for plant height, No. of tillers/plant and 1000-grain weight respectively, were observed at control field condition. Hence, clodinafop propargyl was comparatively most effective weedicide having efficient dose of 140 g/acre to minimalize the outbreak of Phalaris minor with lesser impact on grain yield and related traits.
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