Author(s): S. KUMAR, M. C. RANA, S. S. RANA AND A. SHARMA

Abstract: A field experiment was conducted on acidic soils of Palampur to study the effect of propaquizafop alone and in mixture with other herbicides on growth and yield of soybean and associated weeds. The experiment consisted of eleven treatments including unweeded check were tested in randomized block design and replicated thrice. Propaquizafop significantly reduced the dry weight of E. colona, C. banghalensis and C. iria but not of A. conyzoides and P. alatum. Post-emergence tank mix combination of propaquizafop 50 g + imazethapyr 100 g ha-1 at 20 DAS and quizalofop ethyl 60 g + chlorimuron-ethyl 4 g ha-1 at 15 DAS being comparable were more effective in reducing the dry weight of weeds and were comparable to hand weeding (20 and 40 DAS) in improving growth and yield of soybean. Uninterrupted growth of weeds reduced seed yield of soybean by 56.72 per cent.

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