1. a yellow crystalline herbicide used to control weeds and as a plant desiccant
Usage: chemistry; agriculture

Examples

• The farmer applied diquat to dry out the potato plants before harvest.
• Diquat is commonly used as a contact herbicide in aquatic environments.
• The agricultural extension office recommended diquat for controlling broadleaf weeds.
• Safety equipment is required when handling diquat due to its toxicity.
• Diquat works by disrupting photosynthesis in plant cells.
• The herbicide diquat is banned in several countries due to health concerns.