On August 6, the U.S. EPA announced the emergency suspension of all registrations of dimethyl tetrachloroterephthalate (DCPA). This pesticide was registered to control weeds and is commonly used on broccoli, Brussels sprouts, cabbage and onions.

This is the first time in nearly 30 years the EPA has used an emergency suspension under the Federal Insecticide, Fungicide and Rodenticide Act. Before issuing the order, the EPA consulted with the U.S. Department of Agriculture to understand how growers use DCPA and alternatives to the pesticide.

The action was deemed necessary as pregnant women could unknowingly expose their unborn babies to DCPA. Changes to fetal thyroid hormone levels could result in small birth weight, impaired brain development, decreased IQ and impaired motor skills later in life.

AMVAC Chemical Corporation voluntarily canceled most use of DCPA on turf in December 2023, but risks from other uses remained. The EPA determined there were health risks associated with DCPA use and application, even when personal protective equipment and engineering controls are used. The EPA intends to issue a notice of intent to cancel the DCPA products within the next 90 days.

Read more on the emergency suspension of DCPA here.