Invasive Species Compendium

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Abstract

First report of Fusarium culmorum causing Fusarium head blight of wheat in Wisconsin.

Abstract

In June 2016, as part of a Fusarium head blight (FHB) survey across Wisconsin, USA, symptoms typical of FHB were observed in a winter wheat field in Door County. Temperatures were cooler than average and wet during anthesis. Ten symptomatic heads were collected from one production field in Door County. Diseased heads averaged 40% symptomatic spikelets. Individual heads exhibited bleached kernels and pinkish-orange sporulation typical of FHB. THe causal pathogen was isolated and identified as Fusarium culmorum based on morphological, molecular and pathogenicity analyses. the Tri13 gene sequences of the DO12 and DO14 isolates were deposited in GenBank under accessions MF614687 and MF614688, respectively. This is thought to be the first report of F. culmorum causing FHB on wheat in Wisconsin, USA.