Airborne basidiospores as an inoculum source of Typhula variabilis and the effect of hilling on the incidence of Typhula winter rot of carrots

作者：Ikeda Sachiko^*; Hoshino Tamotsu; Matsumoto Naoyuki; Kondo Norio

来源：Journal of General Plant Pathology, 2017, 83(1): 46-50.

DOI：10.1007/s10327-016-0693-4

• Cultural control
• Infection period
• Overwintering carrots
• Spore dispersal
• Typhula variabilis

Typhula winter rot on overwintering carrots caused by Typhula variabilis is a newly confirmed disease, and no practical control measure is yet available. To develop a control method, here we researched the infection period of T. variabilis and the time that winter rot appeared on carrots. Using spore traps, we found that basidiospore rain occurred from September to November before snowfall in Memuro, Hokkaido. In addition, carrot leaves collected in autumn had already been infected by T. variabilis. These epidemiological investigations revealed that the pathogen releases basidiospores to infect carrot leaves before snow cover, resulting in root decay under snow. An effective control method was then developed to avoid direct contact of basidiospores of T. variabilis with plant tops by covering the plants with soil in autumn. Thus, the percentage of rotted roots was reduced to about half.

• 出版日期2017-1