NDSU: Better Kill That Volunteer Canola

The North Dakota State University Extension Service issued its June 30 Crop & Pest report. Here are is one of our highlights for the week:


Hans Kandel, NDSU agronomist, toured the Mohall, N.D., area and saw sometimes very dense volunteer canola stands on fields too wet to plant this year. Some of the volunteer stands were “higher than a typical seeding rate” and so canola plants were short.

On the plus side, this may act as an “unintended” cover crop.

On the negative side, they can attract flea beetles pests, and act as a host for sclerotinia or white mold. They can produce more seed and future problems. Kandel warns that “if the crop has proprietary genes, the canola cannot be harvested,” and farmers can’t harvest a crop and collect prevent-plant insurance.

To kill the volunteers, look to www.ag.ndsu.edu/weeds/weed-control-guides/nd-weed-control-guide-1. Another option is diquat or paraquat. Mowing won’t stop subsequent blooms, Kandel says.