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Diquat Dibromide

General Information

• Diquat product names
• Chemical Class: Bipyridylium herbicide and dessicant
• Uses: Agriculture drainage areas, irrigation systems, Carrot (including tops), cucumber, melons, pepper, radish,squash, turnip, Potato (white/irish), sorghum, soybeans (unspecified), tomato; lakes/ ponds/ resvoirs, intermittently flooded areas, streams/rivers/channeled water, Residentail ornamental ponds and aquaria, Lawns, and storage areas; targets algae, bladderwort, crabgrass, elodea, jimsonweed, leafy spurge, naiad, poison ivy, salvinia, shepherdspurse, and waterlettuce
• Alternatives: Agriculture, Ornamental/Lawn
• Beyond Pesticides rating: Toxic

Health Effects

• EPA Acute Toxicity Class: II (moderately toxic)
• Cancer: Not documented
• Endocrine Disruption: Not documented
• Reproductive Effects: Yes (17)
• Neurotoxicity: Not documented
• Kidney/ Liver Damage: Yes (4)
• Sensitizer/ Irritant: Yes (8)
• Birth/ Developmental Defects: Not documented

Environmental Effects

• Detected in Groundwater: Not documented
• Potential Leacher: Not documented
• Toxic to Birds: Yes (8)
• Toxic to Fish/ Aquatic Organisms: Yes (8)
• Toxic to Bees: Not documented
• Toxic to Mammals: Not documented
• Long-Range Transport: Not documented

Additional Information

• Regulatory Information:
  • EPA Tolerance Reassessment Progress and Risk Management Decision (TRED) signed (4/2002)
• Supporting information:
  • Daily News Blog entries (Beyond Pesticides)
  • Extoxnet Diquat Dibromide Factsheet (Extension Toxicology Network)
  • PAN Pesticides Database: Diquat Dibromide (Pesticide Action Network)
• Key Studies: