Mechanical, physical barrier, crop competition, fire, crop rotation, and biological and chemical weed are some of the control methods used. Weed management in vegetable cultivation must include both mechanical and cultural control. Living species are employed to kill weeds in biological approaches. Herbicides are used to kill weeds in a chemical technique. Many herbicides are picky about which weeds they kill. To get weeds that the other herbicides miss, it's common to employ a combination of two or three herbicides. Weed management is provided through chemical treatment at three stages of weed growth: pre-plant, pre-emergence and post-emergence.