The Ninth Circuit granted in part one petition to review and denied another petition to review EPA's 2014, 2015, and 2017 decisions to register a pesticide that combines two chemicals—2,4-dichlorophenoxyacetic acid (2,4-D) choline salt and glyphosate—to kill weeds on corn, soybean, and cotton fi...

The Ninth Circuit vacated EPA's 2018 decision to conditionally register three dicamba-based herbicides designed to be sprayed on genetically engineered soybeans and cotton. Nonprofit groups argued the decision violated the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). The court found ...

The Ninth Circuit ordered EPA to respond to a petition requesting that the Agency end the use of the pesticide tetrachlorvinphos (TCVP) in household pet products. An environmental group submitted an administrative petition to cancel the registration of TCVP in 2009, following a peer-reviewed study t...

The Ninth Circuit granted environmental groups' petition to review EPA's 2017 order maintaining a tolerance for the pesticide chlorpyrifos, and vacated the Agency's order. The groups argued that the Agency's need for additional scientific research was not a valid ground for maintaining a tolerance t...