CRITICAL PERIOD OF WEED-CROP COMPETITION AND WEED DYNAMICS IN TRANSPLANTED KHARIF RICE UNDER TERAI AGRO-CLIMATIC REGION OF WEST BENGAL


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Authors

  • P.K. MUKHERJEE, Department of Agronomy, Uttar Banga Krishi Viswavidyalaya, Pundibari Cooch Behar-736 165, West Bengal
  • SWAPAN KUMAR MAITY Department of Agronomy, Uttar Banga Krishi Viswavidyalaya, Pundibari Cooch Behar-736 165, West Bengal
  • SEFAUR RAHAMAN Department of Agronomy, Uttar Banga Krishi Viswavidyalaya, Pundibari Cooch Behar-736 165, West Bengal

Keywords:

Weed-crop competition, weed dynamics.

Abstract

Weed is a constraint in transplanted kharif rice accounting yield loss to the tune of 56 to 58 % if it is left uncontrolled. Critical period of weed-crop competition has been determined from 20 days after transplanting (DAT) to 40 DAT and yield obtained through weeding only during critical period of weed-crop competition was 3% lower than that of season long weed free situation. Among the weeds appeared in transplanted kharif rice, Ludwigia parviflora Roxb. and Echinochloa crus-galli had long emergence profile followed by Monochoria hastata Prest and Sphenochlea zeylanica whereas Cyperus iria L. and Fimbristylis miliacea (L) Rahl. had narrow emergence profile.

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Issue

Vol. 30 No. 1&2 (2009)

Section

Articles

How to Cite

MUKHERJEE, P., MAITY, S. K., & RAHAMAN, S. (2014). CRITICAL PERIOD OF WEED-CROP COMPETITION AND WEED DYNAMICS IN TRANSPLANTED KHARIF RICE UNDER TERAI AGRO-CLIMATIC REGION OF WEST BENGAL. Annals of Agricultural Research, 30(1&2). https://epubs.icar.org.in/index.php/AAR/article/view/42482