Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of DMI-insensitive Cercospora beticola on sugar beet in Ontario, Canada.

Abstract

In September 2016, leaves with Cercospora leaf spot symptoms were collected from twelve commercial sites in sugarbeet-growing region in Ontario, Canada. Disease severity ranged from approximately 40-70% leaf area affected. Resistance to fungicides were tested using difenoconazole, fenbuconazole, flutriafol, prothioconazole and tetraconazole. This is the thought to be the first report of DMI-insensitive Cercospora beticola on Beta vulgaris in Canada.