1020 N Street
NOTICE OF FINAL DECISION CONCERNING REEVALUATION OF PESTICIDE PRODUCTS
The Director of the Department of Pesticide Regulation (DPR), pursuant to Articles 8 and 12 (Title 3) of the California Code of Regulations, files this notice concerning the reevaluation of pesticide products with the Secretary of the Resources Agency for posting. This notice must remain posted for a period of 30 days for public inspection.
DPR commenced reevaluation of pesticide products containing thiophanate-methyl March 29, 1991. The following
is a list of currently registered pesticide products containing thiophanate-methyl an active ingredient
BASIS OF REEVALUATION
DPR initiated the reevaluation based upon several illnesses that occurred over a two-month period in a group of 11 potato processing workers. DPR received five illness reports involving this group of potato processing workers. The illnesses included transient eye irritation and skin rashes in all five workers and short-term fevers in two of the workers. The most serious medical problem was the development by the workers of an asthma-like illness known as reactive airways disease. DPR placed all products containing thiophanate-methyl into reevaluation, even though at the time only one product was registered for use as a fungicide on potato seed pieces.
SUMMARY OF REEVALUATION
Effective February 11, 1992, DPR adopted a regulation restricting the use of thiophanate-methyl for the treatment
of potato seed pieces. The regulation requires employers to assure that their employees handling thiophanate-methyl
wear respiratory protection approved for dusts by the National Institute of Occupational Safety and Health and
the Mine Safety and Health Administration.
FINAL REGULATORY DECISION
DPR has determined that the labels of currently registered pesticide products containing thiophanate-methyl
bear precautionary statements and personal protective equipment requirements that are adequate to mitigate possible
acute toxicity hazards. Therefore, the reevaluation of products containing thiophanate-methyl is hereby concluded.