Telephone

+94 812 388331 / 32/ 34

Email Address

info@doa.gov.lk

Office Address

Department of Agriculture, P.O.Box. 01,
Peradeniya

RRDI_weed_IWMP2

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  • Telephone : +94 372 258561
  • Fax : +94 372 259881
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rice - the staple food - weed management

Integrated Weed Management Practices

Preventive Methods
  • Use clean seeds
  • Keep seed bed weed free
  • Keep  bunds, and irrigation canal clean
  • Keep tools and machinery clean
  • Keep livestock out of field
  • Weed management in nurseries
  • While transplanting, being careful on grasses mimicing rice seedlings
Mechanical Methods
  • Use of mechanical weeders (Rotary weeder)
  • Hand weeding
  • Hoeing
  • Tillage
  • Harrowing
  • Mowing
Biological Methods
  • Use of palnt parasites, predators and pathogens
  • Mulching 
  • Use of Plant extracts as herbicides
  • Use of the Allelopathic effects of other plants
  • Use of plant breeding techniques to develop competitiveness in rice against weeds
Cultural Methods
  • Proper land preparation
  • Water management
  • Fertilizer application in recommended dose (regular soil analysis for nutrients is also important)
  • Use of suitable varieties
  • Sowing at correct time
  • Maintaining proper plant densities
  • Fallowing
Chemical Methods
  • Application of recommended herbicides for weed management in rice. For more information on recommended herbicides READ MORE >>
  • Use of chemical methods could result immediate control of weeds.
  • However such chemicals have merits and demerits.
  • Therefore, an integrated approach is encouraged rather than use of chemicals alone.
Eradication Methods

Eradication of a weed from a particular place is a challenge.

  • Eradication could be achieved only if
    • relevant control methods are repetitively applied until weeds are absent, and
    • preventive methods are followed thereafter.
  • However, management of weeds at economic threshold level would support minimizing weed damages