Sign up to save your podcasts
Or
Share S3 E57 Does Trinexapac Reduce Dollar Spot?
Share to email
Share to Facebook
Share to X
Share to email
Share to Facebook
Share to X
Or
S3 E57 Does Trinexapac Reduce Dollar Spot?
In this episode of Turfgrass Epistemology, we take a close look at one of the most frequently cited studies in turfgrass pathology — Golembiewski and Danneberger’s 1998 Agronomy Journal paper exploring how trinexapac-ethyl (TE) and nitrogen fertility influence the severity of dollar spot (Sclerotinia homoeocarpa) in creeping bentgrass.
The researchers found that TE, a popular plant growth regulator, didn’t increase disease as many feared — in fact, it reduced dollar spot when combined with adequate nitrogen. This discovery challenged the prevailing assumptions of the time and suggested that growth regulation and fertility could work together to reduce fungicide reliance on golf course fairways.
In this discussion, we unpack:
The experimental design and methodology behind the study.
Why mowing height and growth regulation changed disease outcomes.
How nitrogen rate influenced both dollar spot suppression and thatch accumulation.
What this means for modern integrated pest management (IPM) strategies in turfgrass systems.
By the end, we’ll consider whether the mechanisms observed in 1998 still hold true today — and what this research can teach us about evidence-based turf management in the age of marketing claims and quick fixes.
If you enjoy videos that bridge science, history, and turf management, consider subscribing and joining the conversation.
Paper discussed:
Golembiewski, R. C., & Danneberger, T. K. (1998). Dollar spot severity as influenced by trinexapac-ethyl, creeping bentgrass cultivar, and nitrogen fertility. Agronomy Journal, 90(4), 466–470. https://doi.org/10.2134/agronj1998.00021962009000040004x
🔬 Keywords: Dollar Spot, Bentgrass, Dew Removal, Nitrogen, Turfgrass Disease, Integrated Management
Don’t forget to like, share, and subscribe to stay updated on more science-driven insights!
Become a member of Turfgrass Epistemology and support turfgrass research:
www.youtube.com/@TurfgrassEpistemology/join
Voicemail:
859-444-4234
Apple Podcast
https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379
Spotify Podcast
https://open.spotify.com/show/1cTpdrChToeEFAOX9wkXFI
iHeart Radio Podcast
https://www.iheart.com/podcast/1323-turfgrass-epistemology-129043524/
Podbean
https://turfgrassepistemology.podbean.com/
Online consulting
Calendly.com/TravisShaddox
Twitter
Twitter.com/TravisShaddox
Email
Turfgrass Programs and Extension Service Information:
https://www.usna.usda.gov/assets/images/as_pdf_image/LandGrantColleges.pdf
View all episodes
By Travis Shaddox
4.7
1919 ratings
In this episode of Turfgrass Epistemology, we take a close look at one of the most frequently cited studies in turfgrass pathology — Golembiewski and Danneberger’s 1998 Agronomy Journal paper exploring how trinexapac-ethyl (TE) and nitrogen fertility influence the severity of dollar spot (Sclerotinia homoeocarpa) in creeping bentgrass.
The researchers found that TE, a popular plant growth regulator, didn’t increase disease as many feared — in fact, it reduced dollar spot when combined with adequate nitrogen. This discovery challenged the prevailing assumptions of the time and suggested that growth regulation and fertility could work together to reduce fungicide reliance on golf course fairways.
In this discussion, we unpack:
The experimental design and methodology behind the study.
Why mowing height and growth regulation changed disease outcomes.
How nitrogen rate influenced both dollar spot suppression and thatch accumulation.
What this means for modern integrated pest management (IPM) strategies in turfgrass systems.
By the end, we’ll consider whether the mechanisms observed in 1998 still hold true today — and what this research can teach us about evidence-based turf management in the age of marketing claims and quick fixes.
If you enjoy videos that bridge science, history, and turf management, consider subscribing and joining the conversation.
Paper discussed:
Golembiewski, R. C., & Danneberger, T. K. (1998). Dollar spot severity as influenced by trinexapac-ethyl, creeping bentgrass cultivar, and nitrogen fertility. Agronomy Journal, 90(4), 466–470. https://doi.org/10.2134/agronj1998.00021962009000040004x
🔬 Keywords: Dollar Spot, Bentgrass, Dew Removal, Nitrogen, Turfgrass Disease, Integrated Management
Don’t forget to like, share, and subscribe to stay updated on more science-driven insights!
Become a member of Turfgrass Epistemology and support turfgrass research:
www.youtube.com/@TurfgrassEpistemology/join
Voicemail:
859-444-4234
Apple Podcast
https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379
Spotify Podcast
https://open.spotify.com/show/1cTpdrChToeEFAOX9wkXFI
iHeart Radio Podcast
https://www.iheart.com/podcast/1323-turfgrass-epistemology-129043524/
Podbean
https://turfgrassepistemology.podbean.com/
Online consulting
Calendly.com/TravisShaddox
Twitter
Twitter.com/TravisShaddox
Email
Turfgrass Programs and Extension Service Information:
https://www.usna.usda.gov/assets/images/as_pdf_image/LandGrantColleges.pdf
More shows like Turfgrass Epistemology
View all
The Joe Rogan Experience
229,257 Listeners
The MeatEater Podcast
38,103 Listeners
The Investing for Beginners Podcast - Your Path to Financial Freedom
1,413 Listeners
TurPh.Dudes Podcast
16 Listeners
Cal of the Wild
9,643 Listeners
The Shawn Ryan Show
44,567 Listeners
Tiger Turf Talk
15 Listeners
The EarthWorks Podcast
18 Listeners
The Ezra Klein Show
16,096 Listeners
The Grass Factor
32 Listeners
The Lawn Feed
41 Listeners
The ATC Doublecut with Micah Woods
14 Listeners
TN Turf Tuesdays
7 Listeners
Turf Today
48 Listeners
Turf Talk
11 Listeners