Epidemic in turf management: Herbicide resistance in annual bluegrass

phys.org | 10/18/2018 | Staff
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Annual bluegrass is one of the most common weeds of turfgrass on golf courses, and it has developed resistance to common herbicides, threatening the profitability of the turfgrass industry that serves golf courses, sports fields and sod farms as well as commercial and private landscapes. Credit:G. Breeden, courtesy UTIA.

Annual bluegrass is one of the most common weeds of turfgrass on golf courses, sports fields and sod farms, not to mention residential and commercial lawns. Unfortunately this nemesis of pristine landscapes has also developed resistance to many common herbicides. Researchers with the University of Tennessee Institute of Agriculture are participating in a national effort to address what many landscape managers call an epidemic of herbicide resistance in annual bluegrass plaguing managed turf systems.

Part - USDA - Specialty - Crop - Research

As part of a $3.2 million, 15-state USDA Specialty Crop Research Initiative grant, UTIA turfgrass researcher Jim Brosnan will lead a team of Tennessee weed scientists in sampling annual bluegrass populations across the state. The team will travel the state's three grand divisions to take samples from golf courses, sports fields, both residential and commercial lawns, as well as sod production farms. The sampled specimens will then be propagated in a controlled laboratory setting and tested for resistance to commonly used herbicides. The goal is to quantify the scope of herbicide resistance in annual bluegrass populations across Tennessee. Additionally, Brosnan's team will also be developing new diagnostic assays to detect herbicide resistance in annual bluegrass, researching annual bluegrass seed persistence in soil, as well as the effects of turfgrass cultural practices on annual bluegrass infestation.

"This is a landmark study bringing together weed scientists from across the United States to address the important issue of herbicide resistance in annual bluegrass. It is exciting for UTIA to be involved in an effort that will provide such comprehensive and valuable information to...
(Excerpt) Read more at: phys.org
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