Akademik Veri Yönetim Sistemi
8th INTERNATIONAL CONGRESS ON CONTEMPORARY SCIENTIFIC RESEARCH, Aarau, İsviçre, 1 - 08 Temmuz 2025, ss.54-55, (Özet Bildiri)
Recent studies have reported that the fungal agent responsible for brown rot in chestnut nuts is a newly described species, Gnomoniopsis castaneae Tamietti (syn: Gnomoniopsis smithogilvyi L.A. Shuttlew., E.C.Y. Liew & D.I. Guest). This fungus not only causes nut rot in chestnut species but is also associated with stem and branch cankers, leaf necrosis, and may exist as an endophyte. Previous reports have confirmed its pathogenicity in various chestnut cultivars. Brown rot is one of the most significant diseases affecting chestnut yield. In Türkiye, G. castaneae has been identified as the causal agent of nut rot and necrosis on stems and branches of chestnut. To develop disease-resistant cultivars, various species and hybrids are grown in genetic resource plots. In 2024, brown rot was observed intensively on the nuts of Japanese chestnut (Castanea crenata), and the causal agent was investigated. A total of 30 nuts, ten from each of the three Japanese chestnut genotypes, were examined, all of which showed varying degrees of rot. Due to the lack of healthy nuts, pathogenicity tests could not be conducted. However, fungi were isolated from five randomly selected nuts from each genotype, and G. castaneae was successfully isolated from all varieties. The identification was based on the morphological characteristics of the isolates. Although pathogenicity was not tested due to the absence of healthy nts, the frequent isolation of G. castaneae from the samples suggests its pathogenic potential. Expanding this study and determining the pathogenicity of the isolates in future research will be valuable.