International Journal of Chemical Studies
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P-ISSN: 2349-8528, E-ISSN: 2321-4902   |   Impact Factor: GIF: 0.565

International Journal of Chemical Studies

Vol. 6, Issue 6 (2018)
Bio-efficacy of herbicides against weed flora of linseed in vertisols of Chhattisgarh plains


Author(s): Sanjay K Dwivedi

Abstract: Field experiment was conducted during three consecutive rabi season of 2013-14, 14-15 and 2015-16 at Research cum Instructional Farm of Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh to find out the bio-efficacy of herbicides for controlling weeds in linseed in comparison to hand weeding twice at 20 and 40 days after sowing. The most predominant weed flora observed in the experimental plots were Medicago denticulata, Convolvulus arvensis, Parthenium hysterophorus and other weeds. The nine weed management treatments consisted of T1: Weedy check, T2: Hand weeding twice at 20 and 40 DAS, T3: Pendimethalin 30 EC @ 1 kg a.i. ha-1 (PE), T4: Pendimethalin 30 EC + Imaz 2 EC @ 0.75 kg a.i. ha-1 (PE), T5: Pendimethalin 30 EC + Imaz 2 EC @ 1.00 kg a.i. ha-1 (PE), T6: Isoproturon @ 1 kg a.i. ha-1 (PoE), T7: Clodinafop @ 60 g. a.i. ha-1 (PoE), T8: Imazethapyr 10 EC @ 75 g a.i. ha-1 (PoE), T9: Imazethapyr 10 EC @ 100 g a.i. ha-1 (PoE) with the variety of RLC-92. The experiment was laid out in randomized block design with thrice replications. The lowest weed density and dry matter of total weeds at harvest were observed with twice hand weeding treatment (T2), however among herbicides, the lowest value was observed with the application of Isoproturon @ 1 kg a.i. ha-1 as PoE (T6). The growth attributes, seed yield of linseed and weed control efficiency (at harvest) were found highest with twice hand weeding treatment (T2), however among herbicides, application of Isoproturon @ 1 kg a.i. ha-1 as PoE (T6) recorded the higher values. In case of B:C ratio, the application of Isoproturon @ 1 kg a.i. ha-1 as PoE (T6) registered the highest value (2.03) among all weed management practices. Hence the alone application of Isoproturon @ 1 kg a.i. ha-1 as PoE was found most economical herbicide under different weed management practices for linseed in Vertisols of Chhattisgarh plains condition.

Pages: 77-81  |  484 Views  18 Downloads

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How to cite this article:
Sanjay K Dwivedi. Bio-efficacy of herbicides against weed flora of linseed in vertisols of Chhattisgarh plains. Int J Chem Stud 2018;6(6):77-81.
International Journal of Chemical Studies