defoliant

Converse of object

• use: Who remembers that Monsanto made the Agent Orange defoliant used by American bombers during the Vietnam war?

Adjective modifier

• toxic: It was a conflict that presaged Vietnam in many of its political motives, military tactics and in its use of toxic defoliants.
• chemical: To minimize the trash collected, the plants are sometimes sprayed with a chemical defoliant causing the leaves to drop prior to picking.