2021 Hawaii GCSAA Webinar Series
Webinar series is free of charge
Watch this page for registration info and links
Dates: | October 1, 2021 Plant Growth Regulator Use for Warm Season Turfgrass Registration Link: https://forms.gle/FkCTv4PCbdCdYJBF8 Register by 09/28/21 October 8, 2021 Weed Control Update Registration Link: https://forms.gle/CWsmYTEZj1R5HtzK7 Register by 10/05/21 |
Speaker: | Jim Brosnan, Ph.D., Professor, Department of Plant Sciences, University of Tennessee |
Time: | 9 AM --> 10 AM |
Where: | Live on Zoom - Zoom link will be sent to registered participants via email one or 2 days prior to each webinar. |
CEUs |
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Plant Growth Regulator Use for Warm Season Turfgrass Schedule |
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9:00am – 9:10am | Plant growth regulator (PGR) basics – rationale for current programs on golf courses |
9:10am –9:30am | Latest research on PGR efficacy on bermudagrasses used for putting greens. Products such as prohexadione-calcium (Anuew) and trinexapac-ethyl (Primo Maxx) will be discussed in detail |
9:30am – 9:40am | Latest research on regulating bermudagrass at fairway and rough heights of cut. Use of Anuew, Primo Maxx, as well as imazapic (Plateau) will be discussed |
9:40am – 9:50am | Recommendations for PGR applications during periods of suboptimal growth and implications of PGR use on cultural practices used to maintain greens. |
9:50am – 10am | Q & A |
Weed Control Update Schedule |
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9:00am – 9:20am | Latest strategies for pre- and postemergence goosegrass control. Emphasis will be placed on work conducted at Hawaii Lawn Bowling Club in Honolulu. |
9:20am –9:30am | Update on oxadiazon re-registration and implications for annual grass control as well as discussion of glufosinate use in lieu of glyphosate for weed control. Research based strategies for optimizing glufosinate will be discussed. |
9:30am – 9:40am | New herbicides for weed control in warm-season turfgrass |
9:40am – 9:50am | Research on natural products used to control weeds in warm-season turfgrass |
9:50am – 10am | Q & A |

Dr. Brosnan is the head of the turfgrass weed science research and extension program at the University of Tennessee. His research focuses on effective and economical strategies for grassy and broadleaf weed control in various turfgrass systems, including golf courses, athletic fields, commercial and residential landscapes, as well as highway rights-of-way. Dr. Brosnan's research team using cutting edge technology to provide end-users with innovative solutions for managing problematic weeds such as annual bluegrass (Poa annua), dallisgrass (Paspalum dilatatum), goosegrass (Eleusine indica), as well as crabgrass (Digitaria spp.) and sedges (Cyperus spp.)." Dr. Brosnan is particularly interested in the management of herbicide resistant turfgrass weeds.
In addition to work pertaining to weed management, Dr. Brosnan is also a co-Director of the University of Tennessee Center for Athletic Field Safety. The mission of this facility is to research the performance and safety of natural and synthetic turf surfaces used on athletic fields.
He received a B.S. in turfgrass science from Penn State University, an M.S. in plant, soil and insect sciences (turfgrass) from the University of Massachusetts Amherst, and a Ph.D. in agronomy (turfgrass) from Penn State University.
For more information on the turfgrass weed science research program at the University of Tennessee, visit http://tennesseeturfgrassweeds.org