Herbicides can kill many weeds that survive by mimicry, e.g. Phalaris minor and Avena spp. in wheat and Echinochloa spp. in rice.

Herbicides can be safely used where manual weeding damages the crop, e.g. onion, garlic, cumin etc.

Herbicides are convenient to use on perennial and parasitic weeds where other methods are not effective.

Herbicides can effectively be used in closely planted crops where manual and mechanical weeding is not possible.

Herbicides are safe on erodable and sloppy lands where tillage may accelerate soil and water erosion.

Herbicides enable early and timely planting of crops.

Herbicides can be used where physical condition of soil is not conducive to manual weeding, e.g., during rainy spells.

While one time application of a herbicide is often enough, the manual/mechanical method is repetitive.

Herbicides kill weeds insitu without permitting their dissemination.

Herbicides can safely be used to control weeds growing in obstructed situations such as right-of-way, under fruit trees and on undulating lands.

Herbicides provides benefits of timely weed control by controlling weeds at the critical time.

In dryland agriculture, effective herbicidal control ensures higher water use by the crops and less crop failure due to drought.

Planning and management of labour for various agricultural operations in big farms are facilitated by use of herbicides.

Loss of nutrients and moisture is minimized by pre-emergence or pre-sowing application of herbicides.

Use of herbicides provides gender equality in the society as manual weeding is largely done by female labourers.

In many parts of the country the cost of weed control through herbicides is lower than that of manual weeding.