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In this episode of Turfgrass Epistemology, I discuss and interpret the peer-reviewed article “Optimizing Liquid-Applied Iron Sulfate Rate and Application Interval for Dollar Spot Suppression on Golf Course Fairways” by Soldat et al. (2024), published in Crop Science. This paper builds on earlier iron sulfate research and focuses on practical optimization—how rate, application interval, and spray volume influence dollar spot suppression on creeping bentgrass and annual bluegrass fairways. I explain the dose-dependent response observed across multiple locations, why 7-day reapplication intervals consistently outperformed 14-day intervals, and why spray water volume and tank-mixing with fertilizer had minimal impact on disease control. The discussion emphasizes what this research means for golf course superintendents looking to reduce fungicide reliance while avoiding phytotoxicity and unnecessary applications. Rather than treating iron sulfate as a cure-all, I place these results in the context of integrated dollar spot management, fungicide resistance concerns, and realistic expectations for non-fungicidal suppression strategies. If you manage fairways, evaluate iron programs, or want an evidence-based explanation of how liquid iron sulfate actually performs against dollar spot, this video breaks down what the data show—and how to apply it responsibly. Subscribe for more turfgrass science, peer-reviewed paper discussions, and evidence-based explanations focused on how we know what we know in turf management. 🔔 Subscribe for more evidence-based turfgrass content, scientific paper discussions, and long-form explanations that go beyond social media soundbites. #Turfgrass #SoilScience #LawnCare #GolfCourseManagement #TurfgrassScience #SoilFertility #CriticalThinking #TurfTok #TurfgrassEpistemology #EvidenceBased #LawnCareTips 📌 https://www.gofundme.com/f/TurfgrassE... Thank you for being part of this community and for supporting evidence-based turfgrass science. Join Turfgrass Epistemology to get access to perks: / @turfgrassepistemology Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast... Spotify Podcast https://open.spotify.com/show/1cTpdrC... iHeart Radio Podcast https://www.iheart.com/podcast/1323-t... Podbean https://turfgrassepistemology.podbean... 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/imag... Diagnostic Criteria for Turfgrass Bullshit Disorder:https://drive.google.com/file/d/1Y_Ge...