Fusarium head blight (FHB) and Fusarium spp. on grain of spring wheat cultivars grown in Poland release_wjcwobpa2zf3zdkgsbjwsvf6vi

by Leszek Lenc, Grzegorz Czecholiński, Dariusz Wyczling, Tomasz Turów, Arkadiusz Kaźmierczak

Published in Journal of Plant Protection Research by Walter de Gruyter GmbH.

2015   Volume 55, p266-277

Abstract

<jats:title>Abstract</jats:title> Eighteen spring wheat cultivars, recommended for commercial production in northern Poland, were assessed for Fusarium head blight (FHB) in natural non-epidemic conditions, from 2011 to 2013. Assessment was based on FHB incidence (proportion of heads with symptoms), disease severity (DS; proportion of bleached spikelets per head), proportion of <jats:italic>Fusarium</jats:italic> damaged kernels (FDK), and spectrum of <jats:italic>Fusarium</jats:italic> spp. colonising the kernels. Fusarium head blight incidence and DS often differed significantly among cultivars and years. There was a strong positive correlation between FHB incidence and DS. Fusarium head blight incidence and DS were not correlated with the June–July temperatures, and were only occasionally correlated with the total June–July rainfall. There was a weak positive correlation between FHB incidence and proportion of FDK. There was a strong positive correlation between DS and proportion of FDK. The cultivar affected colonisation of kernels by <jats:italic>Fusarium</jats:italic> spp. <jats:italic>Fusarium poae</jats:italic> was the FHB pathogen isolated most often. <jats:italic>Fusarium poae</jats:italic> colonised 6.0% of the kernels, on average, but up to 12.0% on individual cultivars. Other <jats:italic>Fusarium</jats:italic> species were less frequent: <jats:italic>F. avenaceum</jats:italic> in 5.6% of kernels, <jats:italic>F. culmorum</jats:italic> in 5.3%, <jats:italic>F. tricinctum</jats:italic> in 2.8%, <jats:italic>F. graminearum</jats:italic> in 1.5%, and <jats:italic>F. sporotrichioides</jats:italic> in 1.2%. <jats:italic>Fusarium equiseti</jats:italic> occurred sporadically. The importance of <jats:italic>F. poae</jats:italic> in the FHB complex is emphasised. All cultivars expressed 'moderate FHB resistance' if evaluated according to FHB incidence. Cultivars Arabella, Izera, Kandela, Monsun, Ostka Smolicka, and Struna expressed 'moderate susceptibility', and Bombona, Hewilla, Katoda, KWS Torridon, Łagwa, Nawra, Parabola, Radocha, SMH 87, Trappe, Tybalt, and Waluta expressed 'susceptibility' if evaluated by the proportion of FDK. Cultivars differed within the 'moderately resistant', 'moderately susceptible', and 'susceptible' categories. Cultivars Arabella, Izera, Kandela, Monsun, Ostka Smolicka, and Struna were the most promising and their resistance traits may be useful in FHB management.
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Date   2015-07-01
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