View More View Less
  • 1 Tamil Nadu Agricultural University Coimbatore India
Restricted access

A field experiment was conducted during the kharif (June–September) and rabi (October–January) seasons of 2005–2006 to study the effect of a maize — sunflower cropping system on the weed flora shift. The results revealed a change in weed species, i.e. the appearance of new species and the elimination of certain weed species due to the cropping system. The density of Dinebra retroflexa was high during the 1 st year maize cropping period, but Panicum repens became dominant when sunflower was grown after maize. Cyperus rotundus , originally the dominant sedge, was smothered by Cynodon dactylon due to zero tillage. Dactyloctenium aegyptium was the dominant weed species in maize, while Parthenium hysterophorus was the dominant weed species in sunflower. The proportions of Datura fastuosa, Parthenium hysterophorus, Trianthema portulacastrum, Amaranthus viridis, Amaranthus polygamus, Flaveria austerlagica, Gynandropsis pentaphylla and Portulaca quadrifida were higher during the 1 st year maize cropping season, while later their density was gradually reduced due to the inclusion of sunflower in the system.

  • Biswas, D. K., Das, T. M. (1993): Studies on weed shift in jute based cropping systems. Weed Sci. , 2 , 30–32.

    Das T. M. , 'Studies on weed shift in jute based cropping systems ' (1993 ) 2 Weed Sci. : 30 -32.

    • Search Google Scholar
  • Burnside, O. C., Wicks, G. A. (1965): Effects of herbicide and cultivation treatments on yield components of dry land sorghum in Nebraska. Agron. J. , 57 , 21–24.

    Wicks G. A. , 'Effects of herbicide and cultivation treatments on yield components of dry land sorghum in Nebraska ' (1965 ) 57 Agron. J. : 21 -24.

    • Search Google Scholar
  • Dale, J. E., Chandler, J. M. (1979): Herbicide-crop rotation for Johnson grass ( Sorghum halopense ) control. Weed Sci. , 27 , 479–486.

    Chandler J. M. , 'Herbicide-crop rotation for Johnson grass (Sorghum halopense) control ' (1979 ) 27 Weed Sci. : 479 -486.

    • Search Google Scholar
  • Derksen, D. A., Thomas, A. G., Lafond, G. P., Loeppky, H. A., Swanton, C. J. (1995): Impact of postemergence herbicides on weed community diversity within conservation-tillage systems. Weed Res. , 35 , 311–320.

    Swanton C. J. , 'Impact of postemergence herbicides on weed community diversity within conservation-tillage systems ' (1995 ) 35 Weed Res. : 311 -320.

    • Search Google Scholar
  • Fay, P. K. (1990): A brief overview of the biology and distribution of weeds of wheat. pp. 33–50. In: Donald, W. W. (ed.), Systems of Weed Control in Wheat in North America . Weed Sci. Soc. Am., Champaign, IL.

    Fay P. K. , '', in Systems of Weed Control in Wheat in North America , (1990 ) -.

  • Hume, L. (1982): The long-term effects of fertilizer application and three rotations on weed communities in wheat (after 21–22 years at Indian Head, Saskatchewan). Can. J. Plant. Sci. , 62 , 741–750.

    Hume L. , 'The long-term effects of fertilizer application and three rotations on weed communities in wheat (after 21–22 years at Indian Head, Saskatchewan) ' (1982 ) 62 Can. J. Plant. Sci. : 741 -750.

    • Search Google Scholar
  • Ponnuswamy, K., Kandasamy, O. S. (1996): Effect of continuous herbicide application on weed dynamics in a sorghum — cotton cropping sequence. Acta Agron. Hung. , 44 , 325–330

    Kandasamy O. S. , 'Effect of continuous herbicide application on weed dynamics in a sorghum — cotton cropping sequence ' (1996 ) 44 Acta Agron. Hung. : 325 -330.

    • Search Google Scholar
  • Saikia, T. P., Pandey, J. (1999): Weed shift in maize ( Zea mays )-chickpea ( Cicer arietinum ) cropping system. Indian J. Agron. , 44 , 246–249.

    Pandey J. , 'Weed shift in maize (Zea mays)-chickpea (Cicer arietinum) cropping system ' (1999 ) 44 Indian J. Agron. : 246 -249.

    • Search Google Scholar
  • Stevenson, F. C., Legere, A., Simard, R. R., Angers, D. A., Pageau, D., Lanfond, L. (1998): Manure, tillage and crop-rotation — effects on residual weed interference in spring barley cropping system. Agron. J. , 90 , 496–504.

    Lanfond L. , 'Manure, tillage and crop-rotation — effects on residual weed interference in spring barley cropping system ' (1998 ) 90 Agron. J. : 496 -504.

    • Search Google Scholar
  • Teasdale, J. R., Mangum, R. W., Radhakrishnan, J., Cavigelli, M. A (2004): Weed seedbank dynamics in three organic farming crop rotations. Agron. J. , 96 , 1429–1435.

    Cavigelli M. A. , 'Weed seedbank dynamics in three organic farming crop rotations ' (2004 ) 96 Agron. J. : 1429 -1435.

    • Search Google Scholar
  • Tingle, C. H., Chandler, J. M. (2004): The effect of herbicides and crop rotation on weed control in glyphosate-resistant crops. Weed Technol. , 18 , 940–946.

    Chandler J. M. , 'The effect of herbicides and crop rotation on weed control in glyphosate-resistant crops ' (2004 ) 18 Weed Technol. : 940 -946.

    • Search Google Scholar
  • Zanin, G., Otto, S., Riello, L., Borin, M. (1997): Ecological interpretation of weed flora dynamics under different tillage systems. Agriculture, Ecosystems and Environment , 66 , 177–188.

    Borin M. , 'Ecological interpretation of weed flora dynamics under different tillage systems ' (1997 ) 66 Agriculture, Ecosystems and Environment : 177 -188.

    • Search Google Scholar

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
May 2020 0 5 5
Jun 2020 0 0 0
Jul 2020 2 0 0
Aug 2020 4 0 0
Sep 2020 3 0 0
Oct 2020 2 0 0
Nov 2020 0 0 0