Herbicide Resistant Weed Management


Extension weed specialist Dwight Lingenfelter (Penn State) examines a resistant waterhemp plant in soybean, August 2016 (W. Curran, 2016)

Herbicide resistance has arisen and spread due to the overuse of a very small array of common herbicides. There’s no doubt that it is a complex problem that does not have a simple solution. Stemming the development of herbicide resistance and managing existing herbicide resistant weed populations will require integrating multiple control tactics that, when combined together, are the most effective solution to manage the particular weed of concern.

This is called Integrated Weed Management. The prospect of learning and implementing new management tactics can be daunting. However, not all IWM strategies have to involve drastic change to the way the land is managed – often, smaller steps are needed that together help protect the farm against resistant infestations.

Whatever the complexity of the solution, many resources are available to assist producers and other ag profession also in implementing the tactics they need to solve the problem. They’re just not always easy to find. That’s why we have compiled many of these resources on this site. We continue to add more resources as they are developed, to keep you up to date on the best management practices of IWM. Proceed to the IWM Toolbox – each page under this tab describes different strategies for managing herbicide resistant weeds, with links to trusted resources from around the country that provide great information on how they can be used and how to implement them.