Fungal pathogens causing postharvest anthracnose and fruit rot in Indian jujube () from northern Thailand and their fungicide response profiles.

Indian jujube () is an economically important crop in Thailand. During 2024-2025, anthracnose and rot symptoms were observed on postharvest Indian jujube fruits in northern Thailand. Thus, this study aimed to identify the causal agents and evaluate their fungicide response. Nine fungal strains were isolated and identified as , , and through morphological and multi-gene phylogenetic analyses. Pathogenicity tests confirmed and cause postharvest anthracnose, while causes fruit rot. Fungicide assays revealed that was completely inhibited by copper oxychloride and copper hydroxide, with captan, cyproconazole, difenoconazole + azoxystrobin, and difenoconazole also showing effectiveness against most strains. was most effectively inhibited by difenoconazole, although no fungicide achieved complete inhibition. was fully inhibited by carbendazim, copper hydroxide, and cyproconazole, but was not suppressed by azoxystrobin. This represents the first report of and causing anthracnose in Indian jujube in Thailand, and the first worldwide report of causing fruit rot in this crop. These findings provide crucial insights for developing effective management strategies against postharvest diseases of Indian jujube.