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This article reports the first case of Curvularia canadensis causing a brown spot disease on Asparagus kiusianus in Japan. Asparagus kiusianus is an endangered plant found in a restricted coastal area in Northern Kyushu, Japan. The disease was observed in July 2022 along the Nijinomatsubara coast in Saga Prefecture. The researchers conducted experiments to confirm the presence of the fungus and successfully isolated it, satisfying Koch's postulates. DNA analysis confirmed that the fungus was Curvularia canadensis. This study provides valuable information on the potential for cross-infection between A. kiusianus and plants in the Poaceae family and highlights the need for further research on C. canadensis. [Extracted from the article]

Resistance of cultivated asparagus (Asparagus officinalis), wild A. kiusianus and their interspecific hybrids to stem blight caused by Phomopsis asparagi (Sacc.) Bubák was evaluated. A. kiusianus had higher resistance than A. officinalis although there were individual variations. The resistance of interspecific hybrids between A. officinalis and A. kiusianus was mostly intermediate, but some individuals had strong resistance equivalent to A. kiusianus. The results suggest that it is possible to introduce the resistance of A. kiusianus to stem blight into A. officinalis through interspecific hybridization for further Asparagus breeding. [ABSTRACT FROM AUTHOR]