Author Archive

About Karl Danneberger, Ph.D.

Karl Danneberger, Ph.D., is a professor in the department of horticulture and crop science at The Ohio State University. He is author of the popular The Turf Doc column that appears monthly in Golfdom. Karl writes on topics ranging from Poa annua to pest control.

Posts by Karl Danneberger, Ph.D.

Controlling challenging turfgrass diseases: Pythium blight, wet wilt Posted on 06 Aug 2019 in the Columns & Current Issue categories.

Driving to work with my air conditioner blasting and “Cherry Cherry” (from the album “Hot August Night”) blaring on the radio, I started reminiscing about my college turfgrass classes. At Read more»

Don’t get collared by trouble Posted on 09 Jul 2019 in the Columns categories.

Within the rules of golf, the collar falls in the category of “through the green.” The definition of “through the green” (the term was changed, but more on that later) Read more»

A closer look at Hyde Park CC’s fairways Posted on 31 May 2019 in the Columns categories.

This spring, I headed to Hyde Park Country Club in Cincinnati to meet Superintendent Pat O’Brien. Hyde Park CC is a stately club, established in 1909 with a nine-hole course Read more»

As the (earth)worm turns Posted on 07 May 2019 in the Columns categories.

Walking across my lawn in May, I feel bumpiness under my feet. Although not visually apparent, I know bumpy turf is a sign of earthworm casts. Helping verify my diagnosis Read more»

What the scent of spring means for your turf Posted on 22 Apr 2019 in the Columns categories.

The arrival of spring’s warm, sunny days awakens turfgrasses from their dormant winter state. Brownish turf is replaced by dark green, which announces the rejuvenation of life on a golf Read more»

A spring burnout Posted on 12 Mar 2019 in the Columns categories.

Finally, the first day of spring. It’s still cool, but it’s sunny, and the snow is finally gone. After five months of storage, I lift the garage door, revealing my Read more»