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.

As the (earth)worm turns Posted on 07 May 2019 in the Columns & Current Issue 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»

This year and from now on: change Posted on 26 Feb 2019 in the Columns categories.

My campus colleagues tell me that if it’s been dry, it’s going to get drier, if it’s been wet, it’s going to get wetter. Facing us in the new year Read more»

Characterizing a country Posted on 24 Jan 2019 in the Columns categories.

The golf course management business is a global endeavor. I have been fortunate over the last 30 years to be part of it, traveling to places throughout Europe, Asia, the Read more»

Portugal and pesticides Posted on 17 Dec 2018 in the Columns categories.

I have traveled to Portugal numerous times to attend and speak at conferences and to play golf. Portugal is one of my favorite countries. It’s a relatively small country, with Read more»