Critical Period of Weed Competition

Critical Period of Weed Competition

  • The critical period of weed competition is defined as the shortest time span during the crop growth when weeding results in highest Economic returns.
  • The critical period of crop-weed competition is the period from the time of sowing up to, which the crop is to be maintained in a weed-free environment to get the highest economical yield.
  • The weed competition in crop field is invariably severe in the early stages of crop than at later stages.
  • Generally, in a crop of 100 days duration, the first 35 days after sowing should be maintained in a weed free condition.
  • There is no need to attempt for a weed free condition throughout the life period of the crop, as it will entail unnecessary additional expenditure without proportionate increase in yield.

Critical period of weed competition for important crops as follows

 

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