Plant‐based antifungal agents offer an alternative to synthetic fungicides in amenity turfgrass disease management. Poacic acid is a by‐product of the biofuel production process that has exhibited antifungal activity, and the objective of this research was to determine its ability to serve as an effective management tool for economically important turfgrass diseases such as dollar spot and snow moulds. In vitro and field tests were conducted in Wisconsin and Michigan, USA from 2015 to 2017 to determine the efficacy of poacic acid in suppressing the economically important turfgrass pathogens Clarireedia jacksonii and Microdochium nivale. Poacic acid demonstrated strong antifungal activity against both pathogens in vitro, inhibiting growth of C. jacksonii and M. nivale by 93% and 74% relative to nonamended media, respectively. Poacic acid reduced dollar spot in the field in one of two years, but failed to suppress snow mould when applied alone. Poacic acid was an effective mix partner for snow mould control when combined with a synthetic fungicide, an important attribute because no single fungicide currently on the market provides acceptable snow mould control under heavy disease pressure. Future research should focus on improving poacic acid field efficacy so that it can be incorporated into plant‐based disease management strategies for amenity turfgrass.

中文翻译：

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Poacic Acid 抑制 Amenity 草坪草中的美元斑和雪霉

基于植物的抗真菌剂在舒适性草坪病害管理中提供了一种替代合成杀菌剂的方法。Poacic 酸是生物燃料生产过程的副产品，具有抗真菌活性，本研究的目的是确定其作为经济上重要的草坪病害（如金钱斑病和雪霉病）的有效管理工具的能力。2015 年至 2017 年在美国威斯康星州和密歇根州进行了体外和现场测试，以确定 poacic 酸在抑制经济上重要的草坪草病原体 Clarireedia jacksonii 和 Microdochium nivale 方面的功效。Poacic acid 在体外对这两种病原体表现出很强的抗真菌活性，相对于未修正的培养基，分别抑制了 C. jacksonii 和 M. nivale 的生长 93% 和 74%。Poacic acid 在两年中的一年中减少了该领域的美元现货，但单独使用时未能抑制雪霉。当与合成杀菌剂结合使用时，Poacic 酸是控制雪霉菌的有效混合伙伴，这是一个重要属性，因为目前市场上没有单一的杀菌剂在重病压力下提供可接受的雪霉菌控制。未来的研究应侧重于提高禾本科酸的田间功效，以便将其纳入基于植物的舒适草坪病害管理策略。一个重要的属性，因为目前市场上没有一种杀菌剂能在重病压力下提供可接受的雪霉控制。未来的研究应侧重于提高禾本科酸的田间功效，以便将其纳入基于植物的舒适草坪病害管理策略。一个重要的属性，因为目前市场上没有一种杀菌剂能在重病压力下提供可接受的雪霉控制。未来的研究应侧重于提高禾本科酸的田间功效，以便将其纳入基于植物的舒适草坪病害管理策略。