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Research Aims To Improve Poa annua Control May 17, 2019 By Addison Barden, agronomist, Southeast Region

Poa annua has become more difficult to control as populations have become resistant to several herbicide classes.

Regardless of the turf species grown in the Southeast, golf course superintendents are facing an uphill battle with one of the toughest pests in the region: Poa annua. Luckily, a national team of 16 scientists from 15 universities has been assembled to study this problematic weed. Dr. Muthu Bagavathiannan, from Texas A&M AgriLife Research, is leading the $5.7 million dollar federally funded project.

The project will examine all aspects of Poa annua physiology, distribution and growth characteristics. From a management perspective, distribution of herbicide-resistant populations and alternative herbicides will be studied. Bringing plant biology and control methods together, each member of the research team will be collecting Poa annua samples with suspected herbicide resistance while also providing extension and educational support.

If you suspect you have herbicide-resistant Poa annua populations, or would like to learn more about the project, please contact the research team member representing your home state.




Southeast Region Agronomists:

Chris Hartwiger, director, USGA Course Consulting Service –

Steve Kammerer, regional director –

Patrick M. O’Brien, agronomist –

Addison Barden, agronomist –

Information on the USGA’s Course Consulting Service

Contact the Green Section Staff

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