Disease incidence trend of creeping bentgrass in Japan based on diagnosis results

Abstract Disease incidence trend of creeping bentgrass ( Agrostis stolonifera L.) in Japan was investigated based on diagnosis results during 2013–2022. Anthracnose was identified most frequently, followed by bacterial disease, and then Pythium disease. The number of samples diagnosed as these diseases increased in summer. In addition, basidiomycete diseases and pink snow mold were identified frequently. As dollar spot is easily identified on site, the number of the sample was low. In recent years, due to consistently high temperatures, the number of samples in September has tended to increase. Among bacterial diseases, brown stripe (bacterial decline) was identified most frequently, followed by halo blight and bacterial leaf blight. The incidence of brown stripe has tended to increase.