What is a key characteristic of nonselective herbicides?

A key characteristic of nonselective herbicides is that they kill all plants contacted, including desirable turfgrass. This means that when nonselective herbicides are applied, they do not differentiate between weeds and beneficial plants; they will destroy any green plant tissue they come in contact with. This property makes them useful for clearing areas of unwanted vegetation or for preparing sites for new plantings, but it also necessitates precaution to avoid harming wanted plants.

The other choices do not accurately describe nonselective herbicides. The idea that they selectively kill only specific types of weeds is incorrect since that characteristic applies to selective herbicides, which target specific plants while leaving others unharmed. Stating they are safe to use around all plants, including newly seeded turfgrass, is misleading as nonselective herbicides can adversely affect these plants. Lastly, the claim that they are used primarily in the fall season is not a defining characteristic, as nonselective herbicides can be applied at various times, depending on the management goals and the specific weed problems being addressed.