Mycoflora and germination of the grains of Triticale in storage tests
DOI:
https://doi.org/10.33885/sf.1975.2.447Abstract
Grains of six Triticale varieties and of one wheat variety were submitted
to storage tests with different relative humidities in order to see the variation
of the grain mycoflora and loss of grain viability. The mycoflora and germination
percentage of the grains were determined initially and after the
treatments, which consisted of three relative humidities: 75%, 80%, and 85%,
and one temperature: 25°C. For each treatment three samplings, at different
time intervals, were made. From the first sampling, it was found that the
germination of the grains decreased, mainly of those grains maintained at
the two higher relative humidities; there was no difference among the Triticale
varieties, although there was difference among these and the variety of
wheat. After 189 days under 75% relative humidity, the germination of Triticale
was from 26% to 40%, and 90% for wheat. After 175 days at 80%,
the germination of Triticale was from 2% to 13%, and 25% for wheat. At
85% relative humidity, in the third sampling after 105 days, the germination
of Triticale was from 19% to 40%, and 53% for wheat. With respect to the
mycoflora, the fungí originally found in the Triticale and wheat grains ,such
as Alternaría spp. and Fusarium spp., of the so called "field fungí", were
gradually decreasing as the '.storage fungí", mainly represented by species
of the Aspergillus glaucus group, increased to practically 100%.
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