As damage continues, EPA ponders whether dicamba is safe to use at all

The notoriously volatile weedkiller dicamba was blamed for 3,500 incidents of "off-target" damage this year, including to more than 1 million acres of soybeans, said the EPA on Tuesday. The regulator said it was reviewing whether dicamba "can be used in a manner that does not pose unreasonable risks" and said it would help states that wish to restrict use of the herbicide.

Green groups sue EPA over BASF herbicide

Comparing the herbicide trifludimoxazin to dicamba, two environmental groups asked the U.S. appeals court in San Francisco to set aside the EPA’s unconditional approval in May of the new weedkiller. Trifludimoxazin is sold by BASF under the brand name Tirexor and is the first new “mode of …

Arkansas court changes dicamba deadline

Soybean and cotton growers in Arkansas are free to spray the weedkiller dicamba on their crops until June 30 under an order from the Arkansas Supreme Court on Tuesday. It was the latest turnabout in court for use of the herbicide, which has been embraced by farmers as a tool against invasive weeds but criticized as too likely to evaporate from its target areas and land on nearby fields.

EPA managers intruded on dicamba decision making

Three mid-level EPA officials altered scientific documents to support their 2018 decision to keep the weedkiller dicamba in use, reported the office of inspector general at EPA on Monday. Their decision, to extend registration of the herbicide for two years, was overturned by a federal appeals …

First 100 days: It’s Biden’s EPA now. What does that mean for the agrochemical industry? 

Hours after his inauguration, President Biden issued an executive order to review 48 actions by the Trump-era Environmental Protection Agency, including several controversial decisions on agricultural chemicals. Environmental and food safety groups saw the action as a welcome sign that the Biden EPA will begin to temper what they see as the agency's industry-friendly stance and prioritize the environment, public health, and science. (No paywall)

Lawsuit would overturn EPA approval of dicamba

The EPA failed to ensure that dicamba can be used safely when it issued a five-year approval of the weedkiller, said a lawsuit that asks a federal appeals court in San Francisco to vacate the EPA registration of the herbicide. Foes say dicamba is overly prone to evaporate from where it is …

EPA approves dicamba on GE cotton and soybeans through 2025

The Trump administration approved the use of the weedkiller dicamba on genetically engineered cotton and soybeans for the next five years, saying new safeguards would tame a notoriously volatile herbicide blamed for damaging millions of acres of neighboring lands. Farm groups cheered the continued access to a "critically important weed control tool" and the Center for Food Safety, a skeptic of industrial agriculture, said it "will most certainly challenge these unlawful approvals."

Block dicamba until weedkiller is under control, says report

The herbicide dicamba is too risky to use on row crops such as soybeans and cotton until independent research shows it won't evaporate and harm nearby crops and plants, said a report from three conservation and environmental groups on Wednesday. Dicamba is blamed for "off-target" damage on millions of acres of property, and the EPA is considering possible rules for its use on crops in the future.

Dicamba-resistant weeds established in western Tennessee

The fast-growing weed Palmer amaranth has developed a tolerance for dicamba herbicide in least five counties in western Tennessee and likely several others, said University of Tennessee weed specialist Larry Steckel on Monday. The report was a setback for dicamba, which was introduced a few years ago as a new tool for control of invasive weeds that showed resistance to glyphosate and other weedkillers.