Invasive Species Compendium

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Abstract

First report of Pseudomonas syringae pv. actinidiae on kiwifruit plants in Spain.

Abstract

During surveys conducted in the 2011 spring season, a disease was observed on 2-year-old Actinidia deliciosa cv. Hayward and A. chinensis cv. Jin Tao. Kiwifruit orchards with trees showing suspected symptoms were found in Burgueira, Tomino Government, Provincia de Pontevedra, Galicia, Spain. The disease was characterized by typical symptoms on leaves (brown spots surrounded by yellow haloes), red browning on canes, with red sap production. The disease incidence was estimated to be as high as 70-90% based on the proportion of trees with evident symptoms in each orchard. The pathogen was identified as Pseudomonas syringae pv. actinidiae based on physiological, pathogenicity and genetic analyses. This is thought to be the first report of P. syringae pv. actinidiae on kiwifruit cultivars in Spain.