What do we call a chemical used to kill undesirable plants and vegetation?

The term for a chemical that is specifically used to kill undesirable plants and vegetation is herbicide. Herbicides are designed to target and eliminate various types of weeds and unwanted plant species without affecting desirable plants, making them essential in landscaping and agricultural practices. This specificity allows for effective weed management while promoting the health of the desired plants within a garden or landscape.

In contrast, fungicides are chemicals used to kill fungi or prevent their growth, particularly in crops and plants affected by fungal diseases. Pesticides is a broader category that encompasses various substances used to kill pests, including insects, weeds, and fungi, but does not specifically refer to the control of undesirable plants. Insecticides are a subset of pesticides that are specifically formulated to kill insects. Therefore, understanding the specific purpose of these chemical classifications helps in selecting the right product for landscape management.