Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Corynespora cassiicola causing leaf spots on the invasive weed Cryptostegia madagascariensis (Rubbervine) in Brazil.

Abstract

During a visit to rubbervine (Cryptostegia madagascariensis)-infested areas of Ceara and Piaui (Brazil), in July 2015, plants at most sites were found to be healthy, except for one population at the border of the river Paranaiba. Many Cryptostegia madagascariensis leaves at that locality had circular to irregular spots with light brown or white centres delimited by dark brown edges and surrounded by a light brown halo. These were 0.6-1.1 cm in diameter and were accompanied by foliage yellowing and defoliation of plants.The causal pathogen was identified as Corynespora cassiicola based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of Corynespora cassiicola as a pathogen of Cryptostegia madagascariensis worldwide and the third record of a fungal pathogen on this host in Brazil.