Are you seeing extra dicamba damage than final yr, regardless of software cutoff dates and temperature restrictions? You aren’t alone.
The Illinois Division of Agriculture has acquired 273 ag-related herbicide misuse complaints as of July 30. Of these, 161 are associated to off-target dicamba damage — a midseason quantity that’s greater than the full 145 complaints the division acquired in 2020.
Associated: Dicamba 101: What you need to know for 2021
A lot of Illinois agriculture hailed 2020 as a win for dicamba management, and farmers, regulators and trade alike hoped 2021 would possibly comply with swimsuit. For reference, 2019 noticed 723 complete dicamba complaints; 2018 introduced 330 complete dicamba complaints, and 2017 logged 246 complete dicamba complaints.
What’s occurred to trigger the leap in complaints from 2020 to 2021?
Presently, IDOA is investigating damage claims, in an try to substantiate the first causes of dicamba complaints, says Brad Beaver, appearing bureau chief of environmental applications.
“We’ve heard people complain about some of the corn products causing some damage. The complaint forms that have come in have mentioned volatilization as a cause,” he says. “Other forms are looking at straight particle drift, some without authorization and then drift based off of that.”
Earlier than soybeans and cotton have been in a position to be sprayed with dicamba in-season, farmers didn’t have as many dicamba damage complaints, says Karen Corrigan, agronomist and companion in McGillicuddy Corrigan Agronomics. So, these commodities are typically checked out because the villains. Nevertheless, loads of different components could also be at fault.
Corrigan shares different culprits to contemplate:
Corn software. Not like soybean software, a temperature cutoff doesn’t exist for corn software, and better temperatures enhance volatility. Labels enable dicamba software on corn up till stage V10, or 36 inches, which is effectively into the soybean rising season.
Contamination. Contamination can come from dicamba that didn’t get cleaned out correctly. Dicamba can even seep out of hoses, plastic items and poly tanks when herbicides reminiscent of Roundup are left in a single day or longer in the tanks. According to EPA, dicamba contaminants are allowed in 2,4-D, however should be reported above 250 elements per million. Invoice Johnson, Purdue College, just lately shared on Twitter that generic 2,4-D, usually used on Enlist beans, can include as much as 250 ppm of dicamba. He added it takes lower than 100 ppm to trigger cupping signs.
Air temperature inversions. Temperatures over 90 levels F in Illinois assist create extra mist and fog, which point out a temperature inversion. In the end, inversions assist dicamba vaporize and transfer throughout fields and huge distances.
Regardless of the reason for elevated dicamba complaints in 2021, Corrigan says farmers ought to take into consideration product choices for 2022.
“It’s important to remember that XtendiMax, Tavium and Engenia are all still involved in a court case with the environmental groups,” she says. “At any point after oral arguments are completed, those could be pulled off the market.”
She recommends farmers safe herbicides first after which traits. And select a trait with a number of herbicide choices. She provides that standard herbicides reminiscent of Roundup are nonetheless a very good possibility for any trait.
IDOA laws for 2022 may affect product choice. The dicamba software restrictions enforce for 2021 have been below emergency rule and can expire earlier than subsequent rising season, Beaver says. He says they’ll announce updates in time for farmers to make enter choices.
He says discussions have begun with weed scientists and counterparts in different states to find out if the laws of 2021 will turn out to be everlasting. An EPA assessment and any potential proposals can even have an effect on choices.