Species of Fusarium are important phytopathogens, saprobes, and endophytes around the world. Some species can affect plant health and cause yield loss of economic plants. Fusarium species are widely distributed in China, and many species were found from different plant hosts. The Fusarium incarnatum-equiseti species complex (FIESC) is one of the most significant species complexes within the genus. Based on morphological and three-gene (cal, rpb2, and tef1) phylogenetic analyses, two new species are in the Incarnatum clade, and two new host records are identified and described, viz. Fusarium ficisp. nov., Fusarium xylosmatissp. nov., Fusarium fecundum, and Fusarium weifangense.

Coniella species are distributed worldwide and have been reported as plant pathogens, endophytes, or saprobes. In our ongoing survey of terrestrial plant fungi in southern China, we obtained Coniella isolates from diseased plant leaf tissues in Fujian, Hainan, and Yunnan provinces. Maximum likelihood and Bayesian inference based on four loci (ITS, LSU, rpb2, and tef1-α) were used to clarify the taxonomic placement of the species. We confirmed that they represent four new species, namely Coniella diaoluoshanensis, C. dongshanlingensis, C. grossedentatae, and C. veri based on both morphology and phylogeny support. The new species are compared with other Coniella species, comprehensive descriptions and micrographs are provided.

Beltraniaceae comprises mainly saprophytic fungi that occur on various substrates in tropical and subtropical regions worldwide. In our ongoing survey of terrestrial plant fungi in southern China, we collected Beltraniaceae isolates from Guizhou, Hainan, and Yunnan provinces. Maximum likelihood and Bayesian inference analyses based on two genetic loci (ITS and LSU) were employed to determine the taxonomic position of the species. We confirmed that they represent two new species (Beltrania verisp. nov. and Beltraniella danzhouensissp. nov.), three newly recorded species (Beltrania sinensis, Beltraniella fertilis, and Beltraniella jiangxiensis), and one known species (Beltraniella jianfengensis). We provide detailed descriptions and micrographs of these species and compare them with other Beltraniaceae species.

Microdochium has been reported worldwide as a plant pathogen, endophyte, or saprotroph. This study utilized four genetic loci (ITS, LSU, rpb2 , and tub2 ) along with morphological characteristics, employing maximum likelihood and Bayesian inference analyses to identify and establish the taxonomic status of four new species from two host plants (Bambusaceae sp. and Phragmites australis ) in Hainan Province, China. We propose four new species, Microdochium australiana sp. nov. , M. baishamenense sp. nov. , M. bambusina sp. nov. , and M. bambusarum sp. nov. We provide detailed descriptions and micrographs of these species and compare them with other Microdochium species.

The damage process of a component/structure results from the continuous evolution and accumulation of material deterioration. A higher degree of damage indicates a more severe structural condition. This study investigated the seismic damage behavior of unsymmetrical steel-reinforced concrete (USRC) columns through low cyclic loading tests conducted on eight specimens. The height range corresponding to the most unfavorable damage section of the columns was examined. The correlation between the damage evolution of single- and multi-point concrete materials and the plastic development of components was established using embedded piezoelectric transducers and the stress transformation damage factor. The average concrete compression damage factor in the most unfavorable damage section was adopted as the overall damage evaluation index of the components, enabling the development of a “material-section-component” multilevel damage evaluation correlation. The evaluation results were in good agreement with those of the classic Park-Ang model. The findings provide valuable insights for structural damage assessment following seismic events.

Sirococcus ( Diaporthales , Gnomoniaceae ) has recently been recircumscribed based on multilocus phylogenetic and morphological evidence, with all species formerly placed in Gnomoniopsis transferred to Sirococcus under the principle of nomenclatural priority. In this study, we investigated the species diversity of Sirococcus associated with native woody hosts from Fujian, Shandong, and Yunnan provinces, China. A total of six isolates were recovered from leaf samples of plants belonging to Fagaceae , Lauraceae , and Theaceae . Phylogenetic analysis based on concatenated ITS, tef1 , and tub2 sequence datasets resolved these isolates into four Sirococcus species: two new species ( S. euryicola sp. nov . and S. linderae sp. nov .), one new host record for S. fujianensis , and one new geographical record for S. mengyinensis . We provide detailed morphological descriptions, photographic illustrations, and multilocus sequence data for all four species, along with compiled host and distribution notes, and discuss their phylogenetic affinities and taxonomic implications within the genus. Our findings substantially expand the known species diversity, host range, and geographical distribution of Sirococcus in China, and highlight the underexplored diversity of this genus on non- Fagaceae woody hosts.