Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of citrus black spot caused by Phyllosticta citricarpa in Angola.

Abstract

In April 2014, fruit symptoms reminiscent of citrus black spot (CBS) consisting of depressed circular spots of ∼5 mm in diameter with a light-brown to gray centre and black margins surrounded by green rind tissue were observed on a 'Valencia' sweet orange (Citrus sinensis) orchard in Bembe, Uíge Province, Angola, with a disease incidence of 47%. Dark brown pycnidia were present in fruit lesions, which often coalesced forming sunken blemishes. Based on morphological characteristics, DNA sequence analysis and laboratory pathogenicity tests, the causal agent was identified as Phyllosticta citricarpa [Guignardia citricarpa]. This is thought to be the first report of CBS, caused by P. citricarpa, in Angola.