Question

difference between selective and non selective herbicide

Answer 1

Herbicides can be selective or non-selective.

A selective herbicide kills certain plants but not others. Herbicides labeled for control of weeds in lawns, for example, will kill broadleaf weeds like dandelions and thistles, but will not kill grasses. Other herbicides are specifically formulated to kill grassy weeds and so would not be appropriate to use in a lawn area.

Non-selective herbicides kill or damage all plants. These products can be useful for killing weeds growing along fence rows and in cracks in sidewalks and driveways. They can be difficult to use in areas where weeds and desirable plants are growing side by side. Care must be taken to treat only the weed and to not allow any of the product to get onto desirable plants.