Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of leaf spot of spinach caused by Pleospora betae in Spain.

Abstract

In October 2012, light brown leaf spots 1 to 2 cm in diameter with dark concentric rings were observed in a commercial spinach production area in Valencia Province, Spain. The initial outbreak comprised an area of ∼3 ha with a 20% disease incidence. Based on morphological characteristics, sequence analysis of the transcribed spacer regions and pathogenicity tests, the causal agent was identified as P. betae. This is thought to be the first report of leaf spot caused by P. betae on spinach in Spain, where it was previously described affecting sugar beet.