Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Lasiodiplodia pseudotheobromae causing canker and shoot dieback on apple in China.

Abstract

In July 2017, apple (Malus domestica) trees with canker and shoot dieback symptoms on side branches were observed in several young orchards in Yantai, Shandong Province, China. Symptoms included shoot dieback, discoloration of xylem tissues, cankers, and sunken necrotic bark lesions, which surrounded the branches and resulted in the death of the branches. The causal pathogen was isolated and identified as Lasiodiplodia pseudotheobromae based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of the pathogen causing canker and shoot dieback on apple in China.