(Megan Kennelly, KSU Plant Pathology)
One of my favorite resources of all time has been updated again for 2020. It is the Chemical Control of Turfgrass Diseases by Bruce Clarke, Paul Vincelli, Paul Koch, and Gregg Munshaw.
I highly recommend it. You can bookmark it or print it off for free:
http://www2.ca.uky.edu/agcomm/pubs/PPA/PPA1/PPA1.pdf
Happy reading!
