Information on Methomyl
Find information on the registration status, continuous evaluation and mitigation measures in California to regulate this active ingredient. An active ingredient is the chemical that makes a pesticide work on a target pest.
Active Ingredient: Methomyl
Type of Pesticide: Insecticide
California Registration: Yes
EPA Registration: Yes
Fumigant: No
California Restricted Material: Yes
Toxic Air Contaminant (TAC): No
Volatile Organic Compound (VOC): No
Potential Groundwater Contaminant: Yes
Reevaluation Status: None
Chemical Class: Carbamate
DPR Chemical Code: 383
Recent Reports and Announcements
Risk Evaluation and Mitigation Documents
Historic Documents
- February 2009 – Report on Air Monitoring the Application of Methomyl in Fresno County in October 2007
- February 2009 – Appendix A: Site Photographs
- February 2009 – Appendix B: Protocol for the Application Air Monitoring of Methomyl
- February 2009 – Appendix C: S-methyl-N((methylcarabamoyl)oxy)thioacetimidate (Methomyl) Method Development and Analytical Results for Application Air Monitoring Samples in Fresno County
- February 2009 – Appendix D: Field Log Sheets
- February 2009 – Appendix E: Calibration/Certification Reports
- February 2009 – Appendix F: Meteorological Data
- December 2008 – Report on Ambient Air Monitoring for Methomyl and Carbaryl in Fresno, Tulare and Kings Counties during July and August 2007
- December 2008 – Appendix A
- December 2008 – Appendix B: Protocol for the Ambient Air Monitoring of Methomyl and Carbaryl
- December 2008 – Appendix C: Methomyl and Carbaryl Method Development and Analytical Results for Ambient Air Monitoring Samples
- December 2008 – Appendix D
- December 2008 – Appendix E
- September 2006 – Initiation of Risk Assessment Process for the Active Ingredient Methomyl
- February 2004 – Monitoring of Ground Applicators Applying Pesticides in Arbor Trellised Vineyards or T-type Cross Arm Trellised Vineyards
- February 2003 – A Study of Dislodgeable Foliar Residues of Methomyl, Phosmet and Propargite on Grapes in Fresno, Kern and Madera Counties, 1990
- September 2002 – Project 0205 - Methomyl Reentry Incident in Kern County (40-KER-02)
- January 2002 – Equations for Predicted Values and Prediction Limits for Dislodgeable Foliar Residues
- April 1999 – Illness Among Grape Girdlers Associated with Dermal Exposure to Methomyl
- May 1998 – Air Monitoring Results of Metalaxyl and Methomyl Applied to a Potato Field in San Diego County, 1996
- June 1996 – Monitoring a Field Application to Determine Air Concentrations of Methomyl and Metalaxyl, San Diego County December 1995 – Monterey County Residential Air Monitoring
- December 1991 – Calculated Reentry Interval for Table Grape Harvesters Working in California Vineyards Treated with Methomyl
- September 1991 – Dissipation of Methomyl Residues on the Foliage of Greenhouse-Grown Cucumbers, 1991
- March 1990 – Discussion/Decision Document on Whole Leaf Dislodgeable Foliar Residue (WLDFR) Sampling
- March 1990 – Characterization of Methomyl Dissipation on Grape Foliage
- November 1989 – Analysis on Under-Canopy Air in Grape Vineyards Treated with Methomyl to Investigate the Potential for Inhalation Exposure
- February 1988 – A General Survey of Foliar Pesticide Residues and Air Concentration Levels Following Various Greenhouse Applications, 1986
- April 1985 – Degradation of Dislodgeable Methomyl Residue on Sweet Corn Foliage and Husks
- March 1985 – Summary of Illnesses and Injuries due to Occupational Exposure to Pesticides of Ground Applicators Reported by Physicians in California in 1984
- September 1981 – Human Occupational Illnesses and Injuries due to Exposure to Methomyl as Reported by Physicians in California in 1980
- December 1980 – Occupational Illnesses and Injuries due to Exposure to Methomyl in California in 1979
- March 1977 – A Study of the Degradation of Methomyl (Lannate) in and on the Leaves, Husks and Silk on Sweet Corn and the Soil in a Field in Yolo County, California, July 1976
- March 1977 – Study of the Degradation of Lannate (Methomyl) on Outer Leaves of Head Lettuce in Imperial County, California, February 1975
- January 1977 – A Study of the Decay of Lannate (Methomyl) on Grape Foliage in Fresno County, California August 1974
- December 1976 – Decay of Lannate (Methomyl) Residue on Sweet Corn Leaves in Riverside County, California, May 1976
- December 1976 – Lannate (Methomyl) Residue on Young Head Lettuce in Imperial County, California - January 1976
- September 1976 – Human Health and Safety Problems in California in the use of Methomyl as a Pesticide when Formulated as a Powder Containing 90% Active Ingredients
- June 1976 – A Study of the Decomposition of Lannate (Methomyl) on Lettuce in Imperial County, California February 1975
- May 1975 – A Study of Methomyl Residue on Sweet Corn Ears
- April 1975 – Summary of Pesticide Safety Studies Conducted in Imperial County, California During January and February 1975