Methomyl - Overview
Methomyl is a type of insecticide known as a carbamate, first registered for use in the U.S. in 1968. It works by interfering with the nervous system and is considered highly to moderately toxic to humans if it’s swallowed, inhaled, or gets in the eyes.
Exposure to methomyl can lead to nausea, dizziness, and confusion. In severe cases, it can cause paralysis of the respiratory system and even death. Because of these serious health risks, the U.S. Environmental Protection Agency (EPA) has designated methomyl as a Restricted Use Pesticide (RUP) when used in agriculture. As of August 2025, EPA expanded the RUP designation to ALL methomyl products.
In Indiana, all methomyl-containing products are classified as RUPs, due to their toxicity and past cases of misuse.
Key requirements for methomyl in Indiana:
- Sales and distribution are limited to licensed Restricted Use Pesticide Dealers (RUDs).
- Only certified applicators may purchase methomyl products.
- Use is limited to certified applicators or individuals under their direct supervision.
As with all federally restricted use pesticides, sales of methomyl must follow specific recordkeeping rules. For details, visit our RUP Sales & Distribution (Dealers) page. You may find some methomyl products in the field without the RUP labeling. With or without RUP labeling, ALL methomyl products are restricted use in the state of Indiana.
Helpful OISC Resources:
- State Registered Products
- Restricted Use Pesticides List (updated 3/2024) (2024 RUP Listing - OISC (04-04/2024)
- Restricted Use Dealer License
- DriftWatch IN - Map
Federal Resources:
Other Helpful Resources:
Contacts:
For Restricted Use Dealers:
Audrey Powell
Telephone: 765-494-6271
E-mail:
For Product Registrations:
Team E-mail: