US EPA Update on Dacthal Herbicide Health Risks

The U.S. Environmental Protection Agency (US EPA) issued a press release on April 1, 2024, announcing that it will take regulatory action on the herbicide Dacthal because of its significant risks to human health. 

No Dacthal use has been reported in San Diego County since 2021. The only pesticide registered for use in California is Dacthal Flowable Herbicide/AMVAC Chemical Corporation (EPA Reg. No. 5481-487, Caution) with dimethyl tetrachloroterephthalate (DCPA) as the active ingredient.

Dacthal is used primarily for weed control on brassica, melons, turf, collard greens, mustard greens, turnips, horseradish, kale, nursery stock, sweet potatoes, and strawberries.

The California Department of Pesticide Regulation (CDPR) has provided information to growers and Pest Control Advisors regarding the US EPA’s press release, Dacthal use in California, and alternative pest control methods.

To learn more, please review CDPR's notice or contact

Pesticide Container Recycling Event

AWM's Pesticide Regulation Program is hosting a Pesticide Container Recycling Event on Saturday, June 8, 2024. Please see this flyer (Español) to learn more.

Desert Knapweed (Volutaria) Information

A handout with info about Volutaria is now available on AWM's Integrated Pest Control (IPC) webpage.

Asian Citrus Psyllid (ACP) and Huanglongbing (HLB) Information

Find the most up-to-date info for growers and residents on our Citrus Quarantine Program page.

Nursery License Renewal Late Fees

AWM would like to share some info from the California Department of Food and Agriculture (CDFA) on nursery license fees on how to avoid a late payment charge when renewing your nursery license.

CDFA Guidance on Nursery License Registration Late Fees