First report of Lasiodiplodia theobromae causing branch canker on 'Manzanilla' olive in Northwestern Argentina.
In September 2015, a total of 20 cankered branches and/or wood necrosis from 10 orchards showing dieback symptoms were collected from olive cv. Manzanilla trees in Catamarca and La Rioja provinces in Argentina. One cankered branch from each province was selected to study the dark brown internal tissue under the bark. The causal pathogen was isolated and identified as Lasiodiplodia theobromae based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of L. theobromae on olive in Argentina.