First report of root rot caused by Phytophthora nicotianae in avocado trees ( Persea americana ) in Cuba

Abstract

In October 2008, avocado trees (Persea americana) showing decline and dieback were observed in Alquízar, western Cuba. On investigation, some roots were blackened, necrotic and brittle. Based on morphological characteristics, sequence analysis of the internal transcribed spacer region and pathogenicity tests, the causal agent was identified as Phytophthora nicotianae. This is thought to be the first report of root rot caused by P. nicotianae in avocado trees in Cuba.