You’re fighting weed resistance this year and probably the year after that and so on and so forth. That means, it might be time to do something different.
According to North Dakota State University, multiple species like green foxtail and wild oats have developed resistance to both ALS and ACCase chemistries and require an integrated weed management program. Even more so when weed pressure in small grain crops and cereals can account for yield loss and dockage during harvest.
“The best tool to limit resistance and weed pressure is through diversification of your crop portfolio.”
- Kirk Howatt, Associate Professor of Weed Science at North Dakota State University
Kirk Howatt, Associate professor of weed science at North Dakota State University said, “The best tool to limit resistance and weed pressure is through diversification of your crop portfolio. Growers need to rotate crops consistently to alter their crop protection strategy to keep weeds at bay and seed banks low.”
“On top of that, herbicide programs that consistently reduce weed populations are a grower’s best bet,” he added.
Howatt also noted that programs including both a pre and post application can boost yield potential. “In trial studies, when using both a pre and post herbicide application, growers saw a nice yield increase that covered the cost of the pre application.
“That early season damage to really tough grasses like wild oats makes a huge difference when growers come back with a post. It makes the post application even more effective giving the best chance at season-long control,” said Howatt.
Best practices suggest using a multipronged approach to minimize yield loss from weed pressure and limit risk of resistance.
These programs will consider a number of different factors including site of action, timing and level of control. Solid programs account for pressure from both grasses and broadleaf weeds through herbicide diversification.
“Every year growers need to ensure they have an effective plan in place that can limit losses from weed competition and give them their best chance at zero tolerance control,” said Jason Wistehuff, Bayer cereal herbicides product manager. “Making sure fields are clean early and keeping them that way gives you the best chance at success.”
“Growers should use products that provide clean fields from burndown through harvest with wide tankmix
- Jason Wistehuff, Bayer Cereal Herbicides Product Manager
Wistehuff recommends looking for solutions that give you complete control with the most operational flexibility and multiple classes of chemistry. Growers should use products that provide clean fields from burndown through harvest, he added “With wide tankmix compatibility, Olympus is a very effective solution that offers powerful burndown that suppresses pressure from grasses and tough brome species.”
For post-emergence options, Wistehuff says there are few options available that can fit a number of operations like Huskie Complete and Varro.
Huskie Complete is an all-in-one broadleaf and grass herbicide with multiple sites of action including a strong HPPD and a wide window of application, making it an ideal tool for resistance management.
Growers looking to have more rotational flexibility, Wistehuff says, should consider a herbicide like Varro. It can be tankmixed easily with a variety of broadleaf herbicides and allows for growers to plant pulse crops behind wheat without any lingering residual effects.
For more information about minimizing weed competition or improving grain quality in your cereals crops please contact your local Bayer representative.