Author Archive

Photo: Karl Danneberger

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.

Racing versus watching grass grow Posted on 30 Jan 2026 in the Current Issue & From the Magazine categories.

Planning, anticipating, repetition and practice are keys to racing and are also applicable to golf course management. Read more»

The Turf Doc: A case of ‘What’s that?’  Posted on 08 Jan 2026 in the Current Issue & From the Magazine categories.

Two abnormalities that occur that trigger a response like “What’s that?” are annual bluegrass etiolation — or mad tiller disease — and white leaf.  Read more»

How AI is changing golf course design and turf care Posted on 13 Oct 2025 in the Current Issue & From the Magazine categories.

AI is revolutionizing golf course design and turf management by enabling advanced data collection, analysis and more. Read more»

Heat Stress: How hot times are impacting creeping bentgrass Posted on 03 Sep 2025 in the Current Issue & From the Magazine categories.

Creeping bentgrass suffers summer decline from heat stress, but smart management can sustain performance. Read more»

The Turf Doc: An annual bluegrass summer Posted on 28 Jun 2025 in the From the Magazine & Current Issue categories.

Annual bluegrass shifts in late spring from heavy seed production to a weakened root system, making summer management with proper watering, aeration, and disease control crucial for healthy turf Read more»

How climate change is impacting the game of golf Posted on 19 May 2025 in the Columns & Current Issue & From the Magazine categories.

With climate change, we have focused on its impact on turf management. But what may be the effect of climate change on the game of golf itself? Read more»