Which word best describes diquat?

Diquat is best described as an inactivated chemical for several reasons. This herbicide is a non-selective contact herbicide that quickly affects the plant tissues it comes into contact with, leading to the destruction of the weed. When applied, diquat does not move through the plant's vascular system or translocate to other areas, thus limiting its impact only to the tissues where it is applied.

The term "inactivated" implies that diquat does not persist in the environment or within the plant after application, which is true. It rapidly breaks down in the presence of light and moisture, minimizing the risk of long-term environmental impact. This behavior reinforces its classification and practical use in controlling aquatic weeds.

In contrast, systemic refers to herbicides that move throughout the plant, which is not characteristic of diquat. Persistent would describe a chemical that remains active in the environment for an extended period, and translocated implies movement within a plant system, both of which do not apply to diquat.