Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Gliocephalotrichum bacillisporum causing fruit rot of rambutan (Nephelium lappaceum) in Malaysia.

Abstract

A fruit rot of rambutan was observed between August and December 2011 in several areas in the states of Pulau Pinang and Perak, Malaysia. The symptoms initially appeared as light brown, water-soaked lesions that developed first in the pericarp and pulp, later enlarging and becoming dark brown. Greyish brown mycelia were observed on infected areas that turned yellowish at later stages of infection. G. bacillisporum was isolated from infected fruit. The cultural and morphological characteristics of the G. bacillisporum isolates were very similar to previously published descriptions except the conidiophores formed without sterile stipe extensions. Molecular identification was accomplished from the ITS regions using ITS1 and ITS2 primers, and the β-tubulin gene using Bt2a and Bt2b primers. BLAST results from the ITS regions showed a 98-99% similarity with sequences of G. bacillisporum isolates reported in GenBank. This is thought to be the first report of G. bacillisporum causing fruit rot of rambutan in Malaysia.