Farm Progress

Get ready for dicamba application

With soybeans rapidly emerging across Illinois, here’s what you need to know about dicamba herbicide and postemergence spraying in 2018.

Holly Spangler, Prairie Farmer Senior Editor

May 29, 2018

3 Min Read
POSTEMERGENCE: With soybean planting and emergence far ahead of normal in Illinois this year, here’s a quick reminder of what you need to know to make dicamba application successful.

Illinois farmers have once again proved their ability to plant a lot of acres in a short window of time – and warm days mean crops are all but shooting out of the ground.

USDA’s National Agricultural Statistics Service says as of May 20, 96% of the state’s corn was planted, compared to 87% last year and the five-year average of 87%. 

Soybean progress is even more dramatic, with 81% of the state’s soybeans planted by May 20, compared to 44% last year and the five-year average of 42%. Illinois soybeans are 57% emerged, compared to 16% last year and the five-year average of 15%.

With so many soybeans emerged — and continuing to emerge — postemergence spraying will be here before you know it. If dicamba herbicide is part of your crop protection plan, here’s a look at previous stories that provide information to help you keep it on target this year: 

• Dicamba label requirements: 5 red flags. Want to keep in-season dicamba herbicide on target this season? Application expert Bob Wolf says that may not be an easy task. With the future of the technology riding on 2018 success, Wolf says the best way to reduce drift potential is to start with the right nozzle — and even that’s not as simple as it sounds, since the EPA-approved list wasn’t created with optimum weed control in mind. Wolf shares five concerns about nozzles, pressure and spray volume, and how they relate to speed and boom height.

• Spot temperature inversions like a pro. How do spray droplets travel 3 or more miles off target when there’s no wind? Two words: temperature inversion. That’s why Andrew Thostenson, North Dakota State University Extension specialist, says herbicide applicators need to recognize the signs and stop spraying when temperature inversions are present or setting up.

“Inversions don’t create spray drift, but they certainly exacerbate it,” he says, and offers four ways to identify inversions.

• Who’s liable? 6 things to know about dicamba for 2018. In-season dicamba application requirements may seem daunting and confusing, but Aaron Hager, weed specialist at the University of Illinois, says liability is crystal-clear. “The applicator is legally liable,” he says. “There’s a whole new list of things that now, when off-target movement occurs, applicators can be held accountable.”

With new labels, new rules and a new application season looming, Hager shares six things to keep in mind for 2018.

• Dicamba and insurance: What you need to know. The 2017 application season gave farmers and applicators a crash course on herbicide injury and insurance coverage. Ted Mies, a Waverly, Ill., farmer and crop insurance representative, says dicamba drift is not covered by crop insurance, but any yield loss will not impact the farm’s 10-year actual production history if farmers submit a claim.

“If your beans were hurt by dicamba drift and you turn in a claim to me as the agent, then come fall, if you have 20 bushels per acre instead of 60, it won’t go against APH,” he explains. “It will be blank for that year.” And while crop insurance won’t cover yield loss, liability insurance might.

• Dicamba: Insurance and liability in 2018. Here’s a look at complaints and claims in 2017, and how damage didn’t always equal loss. Farmers in Nebraska found the same, where yield impact wasn’t always as bad as symptoms.

• New dicamba tools: Plan, don’t decide. Monsanto and BASF rolled out new tools to help applicators navigate the complicated weather-related XtendiMax and Engenia label requirements. But the tools are for application planning, not decision-making — meaning they’re not for in-field use. Here’s how they work.

About the Author

Holly Spangler

Prairie Farmer Senior Editor, Farm Progress

Holly Spangler has covered Illinois agriculture for more than two decades, bringing meaningful production agriculture experience to the magazine’s coverage. She currently serves as editor of Prairie Farmer magazine and Executive Editor for Farm Progress, managing editorial staff at six magazines throughout the eastern Corn Belt. She began her career with Prairie Farmer just before graduating from the University of Illinois in agricultural communications.

An award-winning writer and photographer, Holly is past president of the American Agricultural Editors Association. In 2015, she became only the 10th U.S. agricultural journalist to earn the Writer of Merit designation and is a five-time winner of the top writing award for editorial opinion in U.S. agriculture. She was named an AAEA Master Writer in 2005. In 2011, Holly was one of 10 recipients worldwide to receive the IFAJ-Alltech Young Leaders in Ag Journalism award. She currently serves on the Illinois Fairgrounds Foundation, the U of I Agricultural Communications Advisory committee, and is an advisory board member for the U of I College of ACES Research Station at Monmouth. Her work in agricultural media has been recognized by the Illinois Soybean Association, Illinois Corn, Illinois Council on Agricultural Education and MidAmerica Croplife Association.

Holly and her husband, John, farm in western Illinois where they raise corn, soybeans and beef cattle on 2,500 acres. Their operation includes 125 head of commercial cows in a cow/calf operation. The family farm includes John’s parents and their three children.

Holly frequently speaks to a variety of groups and organizations, sharing the heart, soul and science of agriculture. She and her husband are active in state and local farm organizations. They serve with their local 4-H and FFA programs, their school district, and are active in their church's youth and music ministries.

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