Monolinuron is a pesticide, more specifically a selective systemic herbicide and an algaecide.

Chloramben is a selective herbicide used to control the seedlings of broadleaf weeds and annual grasses.

It is used as a selective pre-emergent herbicide.

The use of selective herbicides against broad-leafed plants is abandoned, since such chemicals will kill everything except grasses.

Crop safety, for selective herbicides, is the relative absence of damage or stress to the crop.

Most selective herbicides cause some visible stress to crop plants.

Aminopyralid is a selective herbicide used for control of broadleaf weeds, especially thistles and clovers.

There is now a post-emergent, systemic, selective herbicide to use against nimblewill.

Therefore, selective herbicides cannot be used.

Bentazon is a selective herbicide as it only damages plants unable to metabolize the chemical.