Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Phytophthora tropicalis on Rhododendron in Italy.

Abstract

Microbial isolations were made from R. catawbiense plants showing symptoms of wilt, dieback, and death of shoots obtained from two nurseries in Latium, Italy, in the late summer of 2012. A Phytophthora species was consistently recovered from diseased plants. Based on morphological characteristics, the isolates were identified as P. tropicalis. Identity was confirmed by sequence comparison in GenBank with 99% homology both for internal transcribed spacer and mitochondrial partial COI for cytochrome oxidase subunit 1. This is thought to be the first report of damage on rhododendron caused by P. tropicalis in Italy.