Abstract
n this study, field-grown barley was artificially infected during the heading stage with three Fusarium species, F. culmorum, F. graminearum, and F. poae. The objective was to investigate possible differences among Fusarium
species in terms of how severely they affect the quality of barley
under Finnish field conditions. Moreover, we studied the effects of
heavy infection on corresponding malt quality. Field trials were carried
out with two different barley cultivars at two experimental farms.
Spike samples collected during the growing period were analyzed for Fusarium
infection and moisture content. Total precipitation and temperature
data were collected daily. In addition, the harvested barley samples
were analyzed for overall microbial flora and for mycotoxins. The
infection rate and the amount of mycotoxins produced in the barley
samples differed among species. F. graminearum was found to have
the most negative effects on barley quality in terms of the studied
parameters. Samples were malted in laboratory scale. All three Fusarium
species increased the gushing potential of malt. Heavy fungal infection
increased the enzyme activities in malt resulting in darker wort color
and increased soluble nitrogen and free amino nitrogen content. However,
high Fusarium contamination reduced lautering performance.
Original language | English |
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Pages (from-to) | 43 - 49 |
Number of pages | 7 |
Journal | Journal of the American Society of Brewing Chemists |
Volume | 63 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2005 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Artificial inoculation, Field trials, Gushing, Malting, Mycotoxins