In this episode of Turfgrass Epistemology, I discuss the Purdue Extension publication “Common Diseases on Cool-Season Lawns” (BP-218-W), a practical guide to identifying and managing diseases on Kentucky bluegrass and tall fescue.

This publication outlines major lawn diseases including dollar spot, brown patch, Pythium blight, red thread, rust, summer patch, gray leaf spot, and leaf spot/melting out, while also emphasizing the critical distinction between biotic diseases and abiotic disorders such as compaction, drought, and nutrient stress. I explain why accurate diagnosis requires understanding host species, environmental conditions, and disease spread patterns—not just visual symptoms.

If you manage cool-season lawns, advise homeowners, or work in turfgrass disease management, this video breaks down key takeaways from this guide and connects them to evidence-based lawn care practices.

Subscribe for more turfgrass disease management, lawn care science, and evidence-based turfgrass education focused on how we know what we know. Subscribe for more turfgrass science, irrigation research, and evidence-based golf course management discussions focused on how we know what we know.

#Turfgrass #SoilScience #LawnCare #GolfCourseManagement #TurfgrassScience #SoilFertility #CriticalThinking #TurfTok #TurfgrassEpistemology #EvidenceBased #LawnCareTips

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Turfgrass Programs and Extension Service Information: https://www.usna.usda.gov/assets/images/as_pdf_image/LandGrantColleges.pdf

Diagnostic Criteria for Turfgrass Bullshit Disorder:https://drive.google.com/file/d/1Y_GeVPQ237pzm0ImTP4eVij6I9D0PHPn/view

In this episode of Turfgrass Epistemology, I discuss the peer-reviewed article “Dollar Spot Resistance among Blends of Creeping Bentgrass Cultivars” by Abernathy et al. (2001), published in Crop Science.

This study evaluates whether blending creeping bentgrass cultivars can reduce dollar spot severity compared to monostands on golf course putting greens. I explain how highly susceptible cultivars like Crenshaw increased disease pressure in blends, how resistant cultivars like L-93 suppressed dollar spot, and why overall disease levels in blends often reflected a compromise between the resistance levels of the individual components.

The key takeaway: blending resistant and susceptible cultivars can significantly reduce dollar spot compared to planting a susceptible cultivar alone—but blends do not automatically create superior resistance across the board.

If you manage creeping bentgrass putting greens or make decisions about cultivar selection, genetic diversity, and dollar spot management, this video breaks down what the data actually show and how blending fits into an evidence-based disease management strategy.

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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 TravisShaddox@gmail.com

Turfgrass Programs and Extension Service Information: https://www.usna.usda.gov/assets/images/as_pdf_image/LandGrantColleges.pdf

In this episode of Turfgrass Epistemology, I break down the classic Crop Science paper “Assessing Irrigation Management for Its Effects on Disease and Weed Levels in Perennial Ryegrass” by Jiang, Fry, and Tisserat (1998).

This study directly examines how irrigation scheduling (daily vs. ET-based irrigation) influences brown patch, dollar spot, weed pressure, pesticide use, and turf quality on perennial ryegrass fairways. I explain how ET-based irrigation reduced water use by nearly 200%, how daily irrigation suppressed brown patch but increased dollar spot, and why irrigation strategy did not significantly influence crabgrass or dandelion populations.

If you manage golf course fairways or make decisions about irrigation management, turfgrass disease control, and water conservation, this video connects classic research to modern turf management and integrated pest management strategies.

Subscribe for more turfgrass science, irrigation research, and evidence-based golf course management discussions focused on how we know what we know.

#Turfgrass #SoilScience #LawnCare #GolfCourseManagement #TurfgrassScience #SoilFertility #CriticalThinking #TurfTok #TurfgrassEpistemology #EvidenceBased #LawnCareTips

📌 https://www.gofundme.com/f/TurfgrassEpistemology

Thank you for being part of this community and for supporting evidence-based turfgrass science.

Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/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 TravisShaddox@gmail.com

Turfgrass Programs and Extension Service Information: https://www.usna.usda.gov/assets/images/as_pdf_image/LandGrantColleges.pdf

Diagnostic Criteria for Turfgrass Bullshit Disorder:https://drive.google.com/file/d/1Y_GeVPQ237pzm0ImTP4eVij6I9D0PHPn/view