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Prohexadione Calcium

General Information

• Chemical Class:
• Uses: foliarly applied plant regulator which reduces vegetative growth. In apples and pears decreases the need for pruning,allows more light to penetrate the tree canopy increasing fruit coloration,and, due to increased air circulation, decreases the incidence of fire blight, a bacterial disease of apples and pears. In peanuts decreases vegetative growth and aids mechanical harvesting.
• Beyond Pesticides rating:

Health Effects

• EPA Acute Toxicity Class:
• Cancer: Not documented
• Endocrine Disruption: Not documented
• Reproductive Effects: Not documented
• Neurotoxicity: Not documented
• Kidney/ Liver Damage: Not documented
• Sensitizer/ Irritant: Not documented
• Birth/ Developmental Defects: Not documented

Environmental Effects

• Detected in Groundwater: Not documented
• Detected in Streams: Not documented
• Potential Leacher: Yes (39)
• Toxic to Birds: Not documented
• Toxic to Fish/ Aquatic Organisms: Not documented
• Toxic to Bees: Not documented
• Toxic to Mammals: Not documented
• Long-Range Transport: Not documented

Additional Information

• Regulatory Information:
  • Registration Decision Application Status
  • New Chemical Registration Pesticide Fact Sheet issued 4/2000
• Supporting information:
  • PAN Pesticides Database: Prohexadione calcium (Pesticide Action Network)