Indian Journal of Agronomy

  • Year: 2019
  • Volume: 64
  • Issue: 1

Weed management in direct-seeded rice (Oryza sativa) + brahmi (Bacopa monnieri) intercropping system

  • Author:
  • Neeshu Joshi1,, Sunita T. Pandey2, V. Pratap Singh3, Ajit Kumar4, Poonam Gautam5
  • Total Page Count: 5
  • DOI:
  • Page Number: 23 to 27

1Assistant Professor (Agronomy), Agriculture Research Sub-station, Sumerpur-Pali, 306 902

Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar, Uttarakhand, 263 145

2Professor (Agronomy), G.B. Pant University of Agriculture & Technology, Pantnagar, US Nagar, Uttarakhand, 263 145

3Professor (Agronomy), G.B. Pant University of Agriculture & Technology, Pantnagar, US Nagar, Uttarakhand, 263 145

4Assistant Professor (Horticulture); G.B. Pant University of Agriculture & Technology, Pantnagar, US Nagar, Uttarakhand, 263 145

5Assistant Professor (Soil Science), G.B. Pant University of Agriculture & Technology, Pantnagar, US Nagar, Uttarakhand, 263 145

Abstract

An investigation was carried out to evaluate the effect of weed management on yield, yield attributes and eco-nomics of direct seeded rice (Oryza sativa L.) and herb of grace or brahmi [Bacopa monnieri (L.) Pennell] intercropping system at Pantnagar, Uttarakhand, during rainy seasons of 2015 and 2016. The lowest weed density, dry weight and the highest weed-control efficiency were recorded with pendimethalin followed by (fb) cyhalofopbutyl fb 1 hand-weeding 45 days after sowing (DAS) or days after planting (DAP) in 2: 1 row ratio. Dry-herbage yield of brahmi (2.07 and 2.35 t/ha) and grain yield (5.30 and 6.56 t/ha) were highest in sole direct-seeded rice (pendimethalin fb cyhalofop-butyl fb 1 hand-weeding at 45 DAS/DAP) and sole brahmi (3 hand-weedings 30, 45 and 60 DAP). The highest land-equivalent ratio was found with pendimethalin fb cyhalofop-butyl fb 1 hand-weeding at 45 DAS or DAP in alternate row ratio (1: 1) of direct-seeded rice and brahmi during both the years. The higher net returns and benefit: cost ratio were found with pendimethalin fb cyhalofop-butyl fb 1 hand-weeding at 45 DAP in alternate row ratio (1: 1) of rice and brahmi intercropping system.

Keywords

Brahmi, Direct-seeded rice, Intercropping, Weed, Yield