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News & Press: OTF News

Poa Cure Trials at Ohio State

Friday, June 5, 2015  
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Written by John R. Street, Ph.D. and Eva Fang
The Ohio State University

Graduate student, Eva Fang with Ohio State Golf Club Superintendent, Dennis Bowsher.
Ohio State graduate student, Eva Fang and Dr. John R. Street have been researching the efficacy of the new experimental herbicide, 'Poa Cure' (methiozolin) for selective control of Poa annua on golf greens since the fall of 2013. Several projects as part of Eva's Masters Degree are being conducted on the putting greens at the OSU Golf Club with the generous collaboration of superintendent, Dennis Bowsher.

Dr. Street and Eva (his last graduate student before retirement on June 30) have been evaluating via several separate projects the efficacy/effectiveness of Poa Cure for annual bluegrass control (Poa annua) on putting greens at various season timings (spring vs fall), various rates, creeping bentgrass safety and creeping bentgrass recovery/transition during Poa annua decline and/or dead Poa voids using various nitrogen fertility levels and frequencies.

Efficacy/effectiveness results on Poa control have been very promising to date. Fall treatments have resulted in excellent Poa annua control. Nitrogen fertility is critical in the transition stage from Poa to bentgrass and more details on N fertility will be provided in our final recommendations. Spring applications have shown good efficacy for Poa control but fall appears to be a more effective time based on our studies.

Research on Poa Cure safety on bentgrass is also being evaluated at several rates and various N fertility rates as well. It is clear that proper fertility will need to be considered as a part of a program for acceptable safety and bentgrass recovery and transition.

Eva will complete her 2nd full year of Poa Cure research this fall and our recommendations will be submitted once complete.

Even though 'PoaCure' is still in the registration pipeline in the US, we can still foresee it's active performance as a powerful tool for Poa control in the near future. There are a number of courses currently on the EUP program using Poa Cure on fairways and based on our earlier demo research, bentgrass transition from Poa is excellent due to the higher cutting height.

(Thanks to Moghu Research Group of South Korea for their generous financial support of Eva Fang's Masters progam at OSU)

For more information about Poa control, take a look at the following resources:

GDD and Poa annua Seedhead Control

Annual Bluegrass Seedhead Control

Poa Annua: A Worthy Competitor

Looking for more? Mark your calendars for Turfgrass Research Field Day on August 11th. Click here to learn more.

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