Benefit of herbicides
Herbicides were developed in the western world primarily to overcome shortage of farm labour for weeding crops. The benefits are:
a) Herbicides can be used where physical weeding is not possible.
b) From very beginning even before they emerge from the soil, weed can be controlled by using herbicides.
c) Herbicides can kill many weeds that survive by mimicry, e.g. Wild oat in wheat field.
d) They are convenient to use on spiny weeds which cannot removed manually.
e) Herbicides can kill weeds insitu without permitting their dissemination.
f) Lower cost of farm produce.