Taxonomy and phylogeny of three rust fungi parasitic on in Korea, with . on .

Rust fungi are important pathogens of trees, ornamental plants, and food crops. Field research targeting rust diseases across Korea uncovered three distinct species of , affecting different members of the family . In our examination of both wild and cultivated grapevine () species, including , , and , we found as well as a previously undescribed rust species, which we describe here as , which was previously identified as a rust pathogen of spp., has been observed to specifically infect . Through molecular sequence analysis of the ITS, LSU rDNA, and 3 mtDNA regions, we determined the phylogenetic placements of these three species. Our morphological studies revealed the distinguishing features of , particularly its unique teliospore layer and urediniospore dimensions. The emergence of on economically valuable grapevines raises concerns about potential agricultural losses, highlighting the urgency for developing specialized management approaches in viticulture. Na DH, Choi Y-J, Shin H-D (2024). Taxonomy and phylogeny of three rust fungi parasitic on in Korea, with . on . : 127-138. doi: 10.3114/fuse.2024.14.08.