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Updates from the Daily News Blog

Rheumatoid Arthritis Rates Elevated by Pesticide Exposure, Women Disproportionately Affected
August 7, 2025

Over 300 Pesticides Identified in Contaminated Bee Pollen Around the World
September 18, 2024

Beehive Products Contain Concentration of Pesticide Residues High Enough To Be a Risk to Consumer Health
May 18, 2023

Honey Bee Queens' Exposure to Pesticides Weaken Reproductive Success and Colony Development
April 9, 2020

Bee Larvae Adversely Affected by Mix of Pesticides and Inert Ingredients
February 6, 2014

Studies Find that Pesticides Cause Brain Damage in Bees
March 29, 2013

Unprecedented Pesticide Contamination Found in Beehives
March 30, 2010

Bee Die-Offs Linked to Pesticide Mixtures, Window of Exposure
November 3, 2009

Research Shows Wide Array of Pesticide Exposures to Bees
September 2, 2008

Pesticide Exposure Linked to Asthma in Farmers
September 18, 2007

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Coumaphos

General Information

• Product Names:

  CO-RAL emulsifiable livestock insecticide (Bayer)
  Checkmite+ bee hive pest control strip (Bayer)
  Corathon (Bayer) formulated with Diazinon
  Y-Tex CO-RAL livestock dust (Y-Tex)
  Balcom zipcide cattle dust bag (Chem-Tech LTD.)
  Shaker duster (Ritepack Inc.)

• Chemical Class: Organophosphate
• Uses: fleas grubs and ticks on cattle sheep goats horses and swine
• Alternatives: Organic agriculture
• Beyond Pesticides rating: Toxic

Health and Environmental Effects

• Cancer: Not documented
• Endocrine Disruption: Not documented
• Reproductive Effects: Yes (1)
• Neurotoxicity: Not documented
• Kidney/Liver Damage: Yes (1)
• Sensitizer/ Irritant: Yes (1)
• Birth/Developmental: Not documented
• Detected in Groundwater: Yes (1)
• Potential Leacher: Yes (1)
• Toxic to Birds: Yes (1)
• Toxic to Fish/Aquatic Organisms: Yes (1)
• Toxic to Bees: Yes (2)

Additional Information

• Regulatory Status:
  • EPA Reregistration Eligibility Decision (RED). 1996.
• Studies [compiled from the Pesticide-Induced Diseases Database]
  • Coumaphos exposure and incident cancer among male participants in the Agricultural Health Study (AHS).. Christensen CH, Platz EA, Andreotti G, et al. 2010. Environ Health Perspect. 118(1):92-6
  • Pesticide residues in bee bread, propolis, beeswax and royal jelly – A review of the literature and dietary risk assessment . Végh, R., Csóka, M., Mednyánszky, Z. and Sipos, L., 2023. Food and Chemical Toxicology, p.113806.
  • Pesticide exposure and risk of cardiovascular disease: A systematic review. Zago, A. M., Faria, N. M. X., Fávero, J. L., Meucci, R. D., Woskie, S., & Fassa, A. G. (2022). Pesticide exposure and risk of cardiovascular disease: A systematic review. Global public health, 17(12), 3944–3966. https://doi.org/10.1080/17441692.2020.1808693
  • Associations of specific pesticides and incident rheumatoid arthritis among female spouses in the Agricultural Health Study. Parks, C. et al. (2025) Associations of specific pesticides and incident rheumatoid arthritis among female spouses in the Agricultural Health Study, Arthritis & Rheumatology. Available at: https://acrjournals.onlinelibrary.wiley.com/doi/10.1002/art.43318.
  • Pesticides residues and metabolites in honeybees: A Greek overview exploring Varroa and Nosema potential synergies. Kasiotis, Konstantinos M et al. “Pesticides residues and metabolites in honeybees: A Greek overview exploring Varroa and Nosema potential synergies.” The Science of the total environment vol. 769 (2021): 145213. doi:10.1016/j.scitotenv.2021.145213