Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Talaromyces pinophilus causing postharvest rot of sugar beet (Beta vulgaris) in Minnesota, USA.

Abstract

In August 2018, sugarbeet roots with dark brown to blue lesions was observed (5% incidence) in Moorhead, Minnesota, USA. Infected sugarbeet roots were collected and stored in a cold room at 8±2°C, with 78% relative humidity. A week later, dark greyish to blue mould was found on 10% of sugarbeet root surface. In the second week, blue-green mycelial growth was observed on the surface. Based on morphological characteristics, DNA sequencing and pathogenicity, the pathogen was identified as Talaromyces pinophilus. This is thought to be the first report of T. pinophilus causing postharvest rot in sugarbeet in the USA.