Different methods of weed control

weed control

Different methods of weed control:

Weeds are considered as  unwanted plants, which grow out of there proper place , and it is more persistent, prolific, resistance then the crop plant is considered as weeds. Weeds are biggest enemy of the crops, because it causes the yield loss approximately 69%.

Methods of weed control:

Weed management vary according to the plant life cycle, environmental parameters infestation size and management objective.

Successful weed management requires proper plant identification, selection of effective management methods and monitoring the effects over time.

There are different methods of weed control:

  • Preventive control
  • Biological control
  • Culture control
  • Mechanical control
  • Chemical control

1-Preventive control:

It is commonly said that “Prevention is better than cures”. This quote is suitable is in every case either for the human beings or for the plants. Prevention is the most essential aspect of weed management. Weed any increase in size density creates increasingly more expansive management efforts.  Awareness of the weed source and plant identification is must. Feel free to call the weed district office for help with identification or to set up a site visit and recognize:

  • Weed seed can be spread from neighboring properties, adjacent road rights-of-way and trails. Direct sources are often hay, seed and livestock etc.
  • Disturbed ground is most vulnerable to weed invasion: New roads, pipeline and other sites where competitive vegetation removes.
  • Early detection and rapid response saves time and money.”An ounce of prevention is worth of pound of cure.

2-Biological control:

The object of biological control not eradication, In biological control use of living agents suppress vigor and spread weeds. Such agents can be fungi, insect, bacteria or grazing animals like (cows, goats, sheep’s etc) biological is most commonly through as (insect biocontrol)

Some biocontrol insects proven to be successful in certain areas of Larimer County are:

  • Bindweed mites – field bindweed
  • Flea beetles – leafy spurge
  • Mecinus janthiniformus – Dalmatian toadflax

3-Mechanical control:

Mechanical control consist different method that kill or suppress the weeds through physical disruption.  Such method include,

  • Pulling
  • Disking
  • Plowing
  • Mowing


Hand pulling are effective for annual and biannual spices such as kochai and musk etc. removing the upper 3-4 inches of taproot to prevent the re-growth.


Shallow tillage with disk effectively controlling annual weeds such as kochai, if trying to control perennial weeds such as Canada thistle, field bindweed etc have  meristematic root system so the shallow tillage of perennial weeds can result in large ,denser and more uniform infestation than the initial patch.


Moldboard plowing (complete turnover of the top 10-12 inches of soil) moldboard plowing disrupt the underground root system and  buries seed from the surface a depth to deep to germinate.


Mowing is a suppression measure that can prevent or decrease seed head    production. Mowed weeds will re-grow set seed from reduced height so as combined control method is necessary to be effective.

4-Cultural control:

Culture control is best way of weed control in culture control we use cultural method for controlling with different tools like spade,kasola,khupra etc in this method we uproot the weeds.

5-Chemical control:

Application of herbicide can provide most effective and time saving and also money saving method of weed management .many herbicide are present / available in market they are selective for weeds and not injured the crop. Chemical control  is easy way to manage the weeds. But before use of herbicide some instruction for user.


  • Always read the label and label should legally
  • Read the information about herbicide it help to decide which herbicide is appropriate for particular weed but it is not complete label.
  • For individual plants use single nozzle
  • For broadcast multiple nozzle
  • Calibration of spray equipment etc.


Weeds are causing the yield loss in different crops. By controlling weeds, crop production can also be increased.