Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Foot rot and wilt in tomato caused by Fusarium falciforme (FSSC 3+4) in Mexico.

Abstract

In November 2016, unusual disease symptoms were observed in commercial tomato crops in the state of Sinaloa (Mexico). The symptoms included wilting, leaf yellowing, defoliation, vascular tissue darkening, and drying and death of branches and the entire plant. Plant crowns exhibited necrosis (visible in the interior) that advanced through the main root, along with slight root rot. Based on morphological characteristics, sequence analysis of the translation elongation factor 1 alpha gene and pathogenicity tests, the causal agent was identified as Fusarium falciforme [Neocosmospora falciformis] (FSSC 3 + 4). The molecular identification was confirmed via BLAST on the FUSARIUMID and Fusarium MLST databases. FSSC has been previously reported causing foot rot and wilt in tomato in Australia, the USA, Turkey, India and Israel. This is thought to be the first report of foot rot and wilt in tomato caused by F. falciforme in Mexico.