Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Phytophthora capsici associated with phytophthora blight of papaya in Trinidad.

Abstract

Symptoms of a large, dry lesion that was covered in white mycelia and became watery in advanced stages of infection were observed in 2010 in pawpaw fields located in Tableland (south Trinidad) and more recently, in 2016, in Santa Cruz (north Trinidad). The lesions were observed on green and ripe fruit of cv. Tainung No. 2. Lesions developed at contact points between fruits on the fruit column or between the fruit and the stem of the tree. There was no evidence of root rot or stem cankers in trees with symptomatic fruit. Growers reported up to 80% yield loss in all visited fields. The causal pathogen was identified as Phytophthora capsici based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of P. capsici infecting pawpaws in Trinidad.