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Paper Details

Bioefficacy of post emergence herbicides for weed control in soybean [Glycinemax (L.) Merrill] under Chhattisgarh conditions

ANUJ ROSHANTOPPO, DEVENDRA KUMAR DEWANGAN* AND E. SAHU

Journal Title:International Journal of Agricultural Sciences
Abstract


A field experiment was conducted at the Research cum Instructional Farm, Department of Agronomy, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.), during Kharif season of 2010, to find out the bioefficacy of post emergence herbicides for weed control in soybean [Glycine max (L.) Merrill] under Chhattisgarh conditions. All the weed management practices were found effective in controlling the weeds. The maximum total and species wise weed density of Ecinocloa colonum, Cynodon dactylon, Bracharia ramose, Digitaria sanguinalis, Dinebra retroflexa, Cyperus rotandus, Alternanthra sessilis, Parthenium hysterophorus and Euphorbia geniculata were observed under weedy check (T13) and minimum were observed under treatment farmers practice (hand weeding twice) at 20 DAS and 40 DAS (T12). Highest weed control efficiency and seed yield was noted under treatment hand weeding twice at 20 DAS and 40 DAS (T12) and lowest weed control efficiency was observed in weedy check (T13). The economic returns in terms of net returns, additional return over weedy check and B:C ratio were maximum under hoeing twice (by wheel hoe) at 15 DAS and 35 DAS (T11) followed by farmers practice (hand weeding twice) at 20 DAS and 40 DAS (T12), imazethapyr 10 SL @ 100 g ha-1 fb hoeing (by wheel hoe) at 35 DAS (T10) and imazethapyr 10 SL @ 100 g ha-1 fb HW at 35 DAS (T9).

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