Invasive Species Compendium

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Abstract

First report of Pseudomonas syringae pv. actinidiae, the causal agent of bacterial canker of kiwifruit in Slovenia.

Abstract

In May 2013, twenty plants in a production orchard of kiwifruit (Actinidia deliciosa) cv. Hayward in the seaside area of Primorska showed small, angular, coalescing necrotic leaf spots and cankers on green shoots. In the following 2 weeks, disease progressed to wilting and shoot dieback with exudates. Symptoms were consistent with Pseudomonas syringae pv. actinidiae. Based on colony morphology, biochemical test, gene sequence analysis and pathogenicity test, the causal agent was confirmed as P. syringae pv. actinidiae. This is thought to be the first laboratory confirmation of bacterial canker of kiwifruit in Slovenia.