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The Future of Turfgrass Weed Science  


Work in Progress: Stay Tuned!

Wednesday, September 25, 2013

The University of Tennessee Turfgrass Weed Science Team is currently working on a new version of this website that will launch in 2014. The site will not only be completely re-designed to offer a new layout and user interface (including optimization for mobile devices such as iPhone, iPad, etc), but it will also have enhanced new features. New content on the growing issue of herbicide resistance in turfgrass will be added to the site along with tools to monitor growing and cooling degree day accumulation throughout Tennessee. Social media platforms will be further integrated to the site, as well.
Updates to our current website will be limited while we are working on this new version. We thank you for your continued support of this website and hope that you stay tuned for exciting new changes to in 2014!

Time to Control Dallisgrass

Monday, September 16, 2013

Temperatures have fallen across much of Tennessee recently making it an optimal time to initiate herbicide programs for control of dallisgrass and common bermudagrass in cool- and warm-season turf.
Our research has found that herbicide programs designed to control dallisgrass and bermudagrass are most effective once the average daily air temperature continually falls below 72 F. Trials have shown that efficacy is greatest when herbicides are applied at this timing. More information on this topic is available in our fact sheet, W294- Using Growing and Cooling Degree Day Accumulations to Maximize Herbicide Efficacy.
Keep in mind that all herbicide programs for control of dallisgrass and common bermudagrass will require multiple applications over time in order to remove populations from existing turfgrass stands.  However, applying treatments at optimal timings will likely reduce the number of applications required for complete control.

A Sincere Thank You!

Saturday, September 14, 2013

Thank you to all of the individuals who attended our 2013 Turf & Ornamental Field Day this past week at the East Tennessee Research and Education Center here in Knoxville. We had record attendance and can't wait to do it all again in 2014.
Individuals who missed the event can access a full recap of the day via our interactive social media website. Here you'll find pictures of the day, videos, and other media describing the content presented on turf and ornamental management. More information will be posted here in the weeks to come!

Mobile Weed Manual is Here!

Thursday, May 16, 2013

Mobile Weed ManualThe University of Tennessee Turf & Ornamental Weed Science Team has put together a new website and free mobile app called "Mobile Weed Manual," located at It is a breakthrough resource for golf course superintendents, athletic field managers, lawn care professionals and even homeowners to assist green industry enthusiasts in selecting herbicides for use in not only warm- and cool-season turfgrass, but an array of ornamentals as well.


End users can search for a weed they want to control and the app gives advice on which herbicides are most effective. "The Mobile Weed Manual contains not only weed control efficacy ratings for problematic weeds of turf and ornamentals, but tolerance information for over 2300 different species, and labels for nearly 100 different herbicides," said Dr. Jim Brosnan, UT Assistant Professor, Turf & Ornamental Weed Science.  "This powerful resource places all of this research based information in the palm of your hand."


The site was designed to replace hard copy Extension manuals with a dynamic web interface optimized for use on any mobile device (i.e., smart phones, tablets, etc.). "It is our sincere hope that this becomes a valuable tool for all green industry professionals managing weeds," Brosnan said.

The web page also has a direct link for Apple and Android users to download the application to their phone or other mobile device.


Please feel free to contact the University of Tennessee Turf & Ornamental Weed Science Team ( with any questions.

Weed in Focus

Annual Bluegrass
 Poa annua


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