Gateway on Pesticide Hazards and Safe Pest Management

Mesotrione

General Information

• Product Names:
  Callisto (Syngenta)
  Tenacity (Syngenta)
  Realm Q (Du Pont) formulated with Rimsulfuron
  Instigate (Du Pont) formulated with Rimsulfuron
  0.08% Meso + fertilizer (Scotts)

• Chemical Class: Herbicide
• Uses: Pre- and post-emergence control of broad leaf weeds
• Alternatives: Organic agriculture

Health and Environmental Effects

• Cancer: Not documented
• Endocrine Disruption: Not documented
• Reproductive Effects: Not documented
• Neurotoxicity: Not documented
• Kidney/Liver Damage: Yes (39)
• Sensitizer/ Irritant: No
• Birth/Developmental Not documented
• Detected in Groundwater: Not documented
• Potential Leacher: Not documented
• Toxic to Birds: Not documented
• Toxic to Fish/Aquatic Organisms: Not documented
• Toxic to Bees: Not documented

Additional Information

• Regulatory Status:
  • EPA Factsheet
• Supporting information:
  • PAN Pesticide Database (Pesticide Action Network)