Control of Gray Snow Mold Disease in Creeping Bentgrass by Applying a Mixture of Azoxystrobin and Difenoconazole

Woo Sung Kim1,2   Young Sun  Kim3,4,*   Chi Hwan Lim1,*   

1Department of Bio Environmental Chemistry College of Agricultural and Life Sciences Chungnam National University Daejeon 34134 Korea
2Jahngryu Industries Co., Ltd ,Cheongju ,28101, Korea
3Department of Horticultural Science Daegu University ,Gyeongsan, 38453 ,Korea
4Institute of Natural Sciences Daegu University,Gyeongsan 38453, Korea


Gray snow mold disease is caused by Typhula incarnata in the cool season turfgrass during winter. This study was conducted to investigate the control the efficacy of a mixture of azoxystrobin and difenoconazole (AD) against gray snow mold in creeping bentgrass. Treatments were as follows. Control (No application of fungicide), Me treatment (metconazole 0.067 g a.i. m2), AD treatment (azoxystrobin 0.0435 g a.i. m2 + difenoconazole 0.02825 g a.i. m2) and 2AD treatment (azoxystrobin 0.087 g a.i. m2 + difenoconazole 0.0565 g a.i. m2). The control efficacy was investigated in the control, Me and AD treatment, and phytotoxicity in control, Me, AD and 2AD. The control efficacy of AD was 82.5% in the first experiment (November 2020 – April 2021), and 88.6% in the second experiment (November 2021 – April 2022). After applying AD, it was found to reveal the regrowth of creeping bentgrass in the next spring. These results indicated that the application of a mixture of azoxystrobin and difenoconazole suppressed gray snow mold disease in the creeping bentgrass.

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