Author(s):

Sachin Kumar, MC Rana and SS Rana

Abstract: For any new technology to be adopted by the growers, it is not only the efficacy but cost is also a concern. In the present investigation impact assessment of propaquizafop alone in combination with other herbicides is done in soybean. Propaquizafop 50g + imazethapyr 100 g/ha followed by post-emergence tank mix combination of quizalofop-ethyl 60g + chlorimuron-ethyl 4 g/ha at 20 DAS gave higher weed control efficiency, crop resistance index and lowest weed index over other treatments. Net returns due to weed control was highest in post-emergence tank mix combination of propaquizafop 50g + imazethapyr 100 g/ha followed by post-emergence tank mix combination of quizalofop-ethyl 60g + chlorimuron-ethyl 4 g/ha. Treatment/herbicidal efficiency index was highest under hand weeding followed by propaquizafop 50g + imazethapyr 100 g/ha at 20 DAS and quizalofop ethyl 60g + chlorimuron ethyl 4g/ha. Based on an overall impact index, propaquizafop 50g + imazethapyr 100 g/ha on 20 DAS followed by quizalofop ethyl 60g + chlorimuron ethy 4g/ha and propaquizafop 75 g/ha applied on 25 DAS in that order are recommended for an effective weed management in soybean under mid hill conditions of Himachal Pradesh.

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