First report of Lasiodiplodia iraniensis causing postharvest decay in chillies (Capsicum spp.)

Abstract

Fungal pathogens pose significant threats to post-harvest horticultural products, including chillies (Capsicum spp.). This study identified Lasiodiplodia iraniensis as a previously unrecognized causative agent of post-harvest decay in chillies (Capsicum spp.). The pathogen was isolated from diseased chilli fruits and confirmed through subsequent molecular identification via DNA isolation and sequencing. Its internal transcribed spacer (ITS) genetic sequence was submitted to the NCBI database (accession number PP913372). Additionally, the partial translation elongation factor-1 alpha (TEF1) gene was sequenced and submitted to the NCBI database (accession number PQ814684) to further explore its phylogenetic relationships. Subsequently, pathogenicity tests conducted on detached chilli fruits revealed the fungus's aggressive nature, leading to significant decay and confirming Koch's postulates. This highlights the emergence of L. iraniensis as a new threat to chilli quality post-harvest and underscores the need for effective pathogen management strategies to safeguard product quality.