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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.

The spring struggle with Poa annua Posted on 14 May 2026 in the Current Issue & From the Magazine categories.

Spring’s first green-up also marks the start of the battle against Poa annua on golf courses. Read more»

Diagnosis and spread of brown ring patch Posted on 27 Apr 2026 in the Current Issue & From the Magazine categories.

Read about how and why brown ring patch develops in Poa annua during spring. Read more»

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

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

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