Weeds are a constant thorn in the side of pulse producers, but some are proving especially tough to take down.
In this episode of RealAgriculture's Pulse School, Mike Palmier, partner and agronomist with MNP AgIntellect, discusses what makes certain weeds so difficult to kill, and how pulse producers can manage them.
Palmier explains that overwintering perennials, such as dandelions or narrow-leaved hawk's beard, can fly under the radar in the spring, appearing small above ground while hiding robust root systems below ground. Palmier explains that while some weeds may appear small in the spring, they’re often much more mature below ground due to fall development.
When it comes to notorious troublemakers such as kochia, factors like dense growth, leaf hairiness, and herbicide resistance make control efforts even tougher. Palmier says kochia is the top weed challenge in west-central Saskatchewan and notes widespread resistance to Groups 2, 9, and now even 14.
For pulse crops such as lentils and peas — where in-crop weed control options are limited — strategic planning becomes critical. Palmier emphasizes the importance of not placing pulses on fields with a history of poor weed management, warning that doing so can quickly lead to major weed problems.
Palmier’s top three management tips? “Fall herbicide spray...a residual spray...and choose the right fields. Don’t force pulses on a field that doesn’t belong.” He also stresses the value of working closely with an agronomist, noting that their broad field experience can help producers make more informed decisions.
