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Updates from the Daily News Blog

USDA Monitoring Report Declares Pesticide Residues in Food Supply Safe, Despite Science to the Contrary
January 21, 2026

Rejecting Clear Pesticide Label Restrictions, EPA Leaves Protection of Endangered Species Up to Applicators
August 28, 2025

Farmers and Farmworkers Face DNA and Cellular Damage with Chronic Pesticide Exposure, Study Finds
May 29, 2025

Study Finds Reproductive System Effects in Adolescents with Prenatal Pesticide Exposure
April 2, 2025

Sleep Disorders in Farmers and Farmworkers Linked to Pesticide Exposure in Study Supporting Similar Findings
January 31, 2025

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

Health Savings Outweigh Cost of Banning Pesticides Linked to Parkinson’s Disease, According to Study
February 1, 2024

Two Pesticides Threaten Dozens of Endangered Species, EPA Proposes Failed Risk Mitigation Measures
April 14, 2023

Neonicotinoids Combined with Other Pesticides Elevate Hazards to Honey Bee
February 22, 2023

EPA's Deficient Pesticide Analysis Contributes to Ecological Decline
November 21, 2022

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Methomyl

General Information

• Product Names:
  • Lannate (Du Pont)
  • Golden Marlin RF-128 Fly Killer (Wellmark) formulated with cis-9-Tricosene
  • Lurectron Scatterbait (Denka) formulated with cis-9-Tricosene
  • Stimukil Fly Bait (Troy) formulated with cis-9-Tricosene
• Chemical Class: Carbamate
• Uses: Restricted use pesticide. Controls insect pests on field, vegetable, and orchard crops; turf (sod farms only); livestock quarters; commercial premises; and refuse containers.
• Alternatives: Organic agriculture
• Beyond Pesticides rating: Toxic

Health and Environmental Effects

• Cancer: Not documented
• Endocrine Disruption: Yes (1, 2)
• Reproductive Effects: Not documented
• Neurotoxicity: Yes (3)
• Kidney/Liver Damage: Yes (3)
• Sensitizer/ Irritant: Yes (3)
• Birth/Developmental: Not documented
• Detected in Groundwater: Not documented
• Potential Leacher: Not documented
• Toxic to Birds: Yes (4)
• Toxic to Fish/Aquatic Organisms: Yes (4)
• Toxic to Bees: Yes (5)

Additional Information

• Regulatory Status:
  • EPA Plans New Use Limitations on Carbaryl, Carbofuran, and Methomyl to Protect Salmon and Steelhead in California, Idaho, Oregon, and Washington (5/2010)
  • EPA Reregistration Eligibility Decision (RED) signed (12/1998)
• Supporting information:
  • Extoxnet Methomyl Factsheet (Extension Toxicology Network)
  • PAN Pesticides Database - Methomyl (Pesticide Action Network)
• Studies [compiled from the Pesticide-Induced Diseases Database]
  • Effect of methomyl on the biochemical and reproductive parameters in pregnancy rats: the protective role of Pistacia Lentiscus oil. Mosbah, R., Mokrani, N., Mosbahi, I., Rouabhi, S. and Mantovani, A., 2016. In 18th European Congress of Endocrinology (Vol. 41). BioScientifica.
  • Investigating the Acute Metabolic Effects of the N-Methyl Carbamate Insecticide, Methomyl, on Mouse Liver. Groswald, A.M. et al. (2023) Investigating the acute metabolic effects of the N-methyl carbamate insecticide, methomyl, on Mouse Liver, Metabolites. Available at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456691/.
  • Mixture effects of thiamethoxam and seven pesticides with different modes of action on honey bees (Aplis mellifera). Li, W. et al. (2023) Mixture effects of thiamethoxam and seven pesticides with different modes of action on honey bees (Aplis mellifera), Scientific Reports. Available at: https://www.nature.com/articles/s41598-023-29837-w#ref-CR30.
  • Unveiling bee pollen's contamination with pesticides and mycotoxins: Current analytical procedures, results and regulation. Carrera, M. et al. (2024) Unveiling bee pollen’s contamination with pesticides and mycotoxins: Current analytical procedures, results and regulation, Trends in Analytical Chemistry. Available at: https://www.sciencedirect.com/science/article/abs/pii/S0165993624004187.
  • A Th2-type immune response and low-grade systemic inflammatory reaction as potential immunotoxic effects in intensive agriculture farmers exposed to pesticides . Lozano-Paniagua, D. et al. (2024) ‘A th2-type immune response and low-grade systemic inflammatory reaction as potential immunotoxic effects in intensive agriculture farmers exposed to pesticides’, Science of The Total Environment, 938, p. 173545. doi:10.1016/j.scitotenv.2024.173545.
  • Pesticide-Induced Inflammation at a Glance. Lopes-Ferreira, M. et al. (2023) ‘Pesticide-induced inflammation at a glance’, Toxics, 11(11), p. 896. doi:10.3390/toxics11110896.
  • Pesticide exposure and sleep disorder: A cross-sectional study among Thai farmers. Juntarawijit, C. et al. (2025) Pesticide exposure and sleep disorder: A cross-sectional study among Thai farmers, Heliyon. Available at: https://www.cell.com/heliyon/fulltext/S2405-8440(24)17154-X.
  • Pesticide Residues on Three Cut Flower Species and Potential Exposure of Florists in Belgium. Toumi, K., Vleminckx, C., Van Loco, J., & Schiffers, B. (2016). Pesticide Residues on Three Cut Flower Species and Potential Exposure of Florists in Belgium. International Journal of Environmental Research and Public Health, 13(10), 943. https://doi.org/10.3390/ijerph13100943
  • Prenatal residential proximity to endocrine disrupting agricultural pesticides and menstrual cycle characteristics among Latina adolescents in California. Paul, J. et al. (2025) Prenatal residential proximity to endocrine disrupting agricultural pesticides and menstrual cycle characteristics among Latina adolescents in California, American Journal of Epidemiology. Available at: https://academic.oup.com/aje/advance-article/doi/10.1093/aje/kwaf059/8083004.
  • Effect of methomyl formulation, a carbamate pesticide on ovarian follicular development and fertility in albino mice. Shanthalatha, A., Madhuranath, B. N., & Yajurvedi, H. N. (2012). Effect of methomyl formulation, a carbamate pesticide on ovarian follicular development and fertility in albino mice. Journal of environmental biology, 33(1), 33–37.
  • Assessment of genetic damage levels in agricultural workers exposed to pesticides in Paraíba, Brazil. Carvalho-Gonçalves, L. et al. (2025) Assessment of genetic damage levels in agricultural workers exposed to pesticides in Paraíba, Brazil, Environmental Toxicology and Pharmacology. Available at: https://www.sciencedirect.com/science/article/abs/pii/S1382668925000900.
  • Methomyl-induced developmental and cardiovascular toxicity in zebrafish via immune response, oxidative stress, and apoptosis. Lee, H. et al. (2025) Methomyl-induced developmental and cardiovascular toxicity in zebrafish via immune response, oxidative stress, and apoptosis, Science of The Total Environment. Available at: https://www.sciencedirect.com/science/article/abs/pii/S0048969725018558.
  • Methomyl, a carbamate insecticide, forms oxygenated transformation products that inhibit acetylcholinesterase upon chlorination. Matsushita, T. et al. (2025) Methomyl, a carbamate insecticide, forms oxygenated transformation products that inhibit acetylcholinesterase upon chlorination, Water Research. Available at: https://www.sciencedirect.com/science/article/abs/pii/S0043135425009765.