Ground Application
For all of your spraying needs contact us at 712-722-2675. We provide custom spraying and any chemicals you may need,if you need weed scouting done or advice on an excellent weed management program with multiple modes of action let us know.
There Are No “Superweeds” – Just Unsustainable Practices
Challenges posed by glyphosate-resistant weeds are making it clear that long-term weed control must be based on best weed management practices. New data highlights industry expert agreement that herbicide programs with multiple modes of action are essential.
“A ‘superweed’ is a weed that is resistant to an herbicide, and we have been dealing with resistant weeds for more than 50 years,” said Steve Weller, horticulture professor, Purdue . “Individual plants adapt to any stressor, mechanical or chemical, and gradually become the predominant biotype. Using any single management practice over and over will eventually produce a resistance challenge.”
Recent Field Report of Auxin Resistance Reinforces Need for Several Modes of Action
Resistance to auxin herbicides like 2,4-D has been relatively rare despite six decades of use. However, repeated reuse over an extended period without the of alternate modes of action, tillage or crop rotation can build weed resistance to any class of any herbicide, including auxins. One such case now under study involves a non-crop land production field that received continual treatments of 2,4-D up to twice a year for at least 15 years. These practices resulted in an isolated case of resistant waterhemp, due to this tremendous selection pressure exerted on a single mode of action over a period of many years.
“In looking at this specific field, the importance of multiple modes of action is very clear,” says Greg Kruger, Cropping Systems Specialist, West Central Research & Extension Center, University of Nebraska-Lincoln. “It is unrealistic to expect any herbicide that is used exclusively for this extended period of time to not come under some pressure.”
Multiple Modes of Action Like Adding Several Locks to a Door
Weller likens the best management practice of using multiple modes of action to that of adding a deadbolt to a door that only locks at the knob. “The thief, in this case the weed, might manage to get by one of the locks, but if you have several, as in several modes of action, it is much harder. If you can control a weed with two or three mechanisms of action, the likelihood of resistance occurring to all the mechanisms used is greatly reduced.”