Invasive Species Compendium

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Abstract Full Text

Efficacy of hand weeding, different pre and postemergence herbicides and their combinations for weed management in soybean crop.

Abstract

A field experiment was conducted to study the efficacy of hand weeding, different pre and post-emergence herbicides and their combinations to control the weeds in soybean during Kharif season of the year 2015 and 2016. Among the different treatments, hand weeding at 20 and 40 days after sowing recorded significantly lowest weed density, weed dry matter and weed index. It also found superior in respect of weed control efficiency, various growth and yield attributing parameters and attained significantly highest seed yield (13.89 qha-1) of soybean. While among the different pre and post emergence herbicides, integrated use of herbicides gave better weed control and seed yield than their individual application. Post emergence application of (imazathapyr 23 g/l+imazamox 23 g/l+bentazone 460 g/l) 700 gha-1 recorded significantly lower weed density, weed dry matter and weed index but at par with the quizalofop ethyl (5% EC) 50 gha-1 + chlorimuron ethyl (25% EC) 9 gha-1 as post emergence. It also found superior in respect of weed control efficiency, various growth and yield attributing parameters and attained significantly higher seed yield (13.16 qha-1) of soybean but at par with the quizalofop ethyl (5% EC) 50 gha-1 + chlorimuron ethyl (25% EC) 9 gha-1 (12.99 qha-1) as post emergence application.