Farm Progress

Weed resistance help for wheat on the way

Tolvera features new chemistry for the cereals market, offering help on resistance and increased rotation flexibility.

Tom J. Bechman, Midwest Crops Editor

May 10, 2024

2 Min Read
A wide landscape view of a cereal field
WEED CONTROL: Corteva Agriscience will launch Tolvera for weed control in cereals in 2025. It features an active ingredient new to cereals herbicides. Corteva Agriscience

If you’re serious about growing wheat and other cereals but worried about weed threats, the future just got brighter. U.S. EPA recently registered Tolvera herbicide for broadleaf and grass control in many cereal crops, including spring and winter wheat, durum wheat, and barley. Corteva Agriscience, which will make and market Tolvera, expects the herbicide to be available for use in 2025.

Drew Clark, Corteva cereal herbicide product manager, underscores several reasons why this is good news for cereal crop growers:

New active ingredient. Tolvera features tolpyralate, a new active ingredient for weed control in cereals. It is already used as an ingredient in certain corn herbicides.

Weed resistance tool. Adding another active ingredient in cereals within the HPPD inhibitors Group 27 will help combat resistance concerns among key weeds like kochia, waterhemp, and green and yellow foxtail.

Rotation flexibility. Plantback restrictions for Tolvera will be within nine months for most major crops, which is much shorter than for some other cereal herbicides. This increases rotation flexibility, opening the door for rotations with field peas, lentils, canola, chickpeas, soybeans and sunflowers.

Safety and versatility. Tolvera’s active ingredients, tolpyralate and bromoxynil, have a good track record for crop safety, and this formulation will tank-mix with many other products, Clark says. Consult the product label for specific recommendations on mixing and handling.

Wide application window. Tolvera can be applied to cereals anytime from first leaf to the jointing stage.

What’s next for Tolvera

The next step is to request and receive state labels for Tolvera now that federal registration is granted, Clark explains. Corteva will concentrate on labeling Tolvera for use in Oregan, Washington and Idaho, followed by North Dakota, South Dakota, Montana, and Minnesota. As labels fall in place, the company will seek registration in other wheat-growing regions, including Kansas.

“This will be a premium option compared with other herbicides and may not fit the budget as well in parts of the country like the Plains,” Clark says. “As people see its value, we will make it available in more regions.

“It will be another tool for growers to use, especially where resistance in kochia, waterhemp and other weeds are becoming a bigger issue. The fact that growers can come back with some key crops in nine months — not 15 months, as with some other products — will be a big plus in areas where these specialty crops are important.”

If there is a key to achieving maximum performance from Tolvera, Clark says it will be applying the herbicide on weeds while they are still relatively small. That’s a similar refrain heard in corn and soybean country with many herbicides.

“We recommend applying it on weeds that are 4 inches tall or smaller,” Clark says. “When applied according to the label on the right size weeds, it performs very well.”

For more details, visit

Read more about:


About the Author(s)

Tom J. Bechman

Midwest Crops Editor, Farm Progress

Tom J. Bechman became the Midwest Crops editor at Farm Progress in 2024 after serving as editor of Indiana Prairie Farmer for 23 years. He joined Farm Progress in 1981 as a field editor, first writing stories to help farmers adjust to a difficult harvest after a tough weather year. His goal today is the same — writing stories that help farmers adjust to a changing environment in a profitable manner.

Bechman knows about Indiana agriculture because he grew up on a small dairy farm and worked with young farmers as a vocational agriculture teacher and FFA advisor before joining Farm Progress. He works closely with Purdue University specialists, Indiana Farm Bureau and commodity groups to cover cutting-edge issues affecting farmers. He specializes in writing crop stories with a focus on obtaining the highest and most economical yields possible.

Tom and his wife, Carla, have four children: Allison, Ashley, Daniel and Kayla, plus eight grandchildren. They raise produce for the food pantry and house 4-H animals for the grandkids on their small acreage near Franklin, Ind.

Subscribe to receive top agriculture news
Be informed daily with these free e-newsletters

You May Also Like