Volunteer Canola Control In An Unseeded Field

Jul 11, 2011

Volunteer Canola Control In An Unseeded Field

Growers with unseeded acres are finally able to do some spraying. They need to control volunteer canola that is now done flowering. Canola that is done flowering will have already produced a large amount of viable seed. Unfortunately, controlling plants at this stage of growth will do little to reduce the viability of those seeds.

If controlling volunteer canola is desirable for other reasons (i.e. moisture conservation), apply glyphosate at 420 grams per acre to non-Roundup Ready volunteers. For Roundup Ready volunteers, growers have a variety of herbicide options that can be used on unseeded fields.

Before spraying these products, ask the retailer or company rep for recommended rates for volunteer canola at this size, and check the product's recropping restrictions. Some have residual periods that may affect cropping options for next year.

Growing a cereal on that field in 2012 will give the field a canola break and provide another opportunity to control any volunteers that set seed. Mowing and tillage are other options.

Source: Canola Council of Canada

Video: Dr. Emerson Nafziger: Nitrogen Fertilizer Rates for Corn

The Crop Science Podcast Show, Dr. Emerson Nafziger from the University of Illinois breaks down decades of nitrogen research. From the evolution of N rate guidelines to how soil health and hybrid genetics influence nitrogen use efficiency, this conversation unpacks the science behind smarter fertilization. Improving how we set nitrogen fertilizer rates for rainfed corn is a key focus. Discover why the MRTN model matters more than ever, and how shifting mindsets and better data can boost yields and environmental outcomes. Tune in now on all major platforms!

"The nitrogen that comes from soil mineralization is the first nitrogen the plant sees, and its role is underestimated."

Meet the guest:

Dr. Emerson Nafziger is Professor Emeritus of Crop Sciences at the University of Illinois at Urbana-Champaign, with degrees in agronomy from Ohio State, Purdue, and Illinois. His research has focused on nitrogen rate strategies and crop productivity. He co-developed the Maximum Return to Nitrogen (MRTN) model, which is widely used across the Midwest. His research spans N response trials, hybrid interactions, crop rotation effects, and yield stability.