Seed transmission of Rhynchosporium secalis, causal fungus of barley leaf blotch
DOI:
https://doi.org/10.33885/sf.1986.3.671Abstract
In order to understand the importance of seed as primary inoculum, several
studies concerning the seed transmission of the fungus Rhynchosporium secalis
were made ¡n Great Britain with eight seed barley varieties, ¡n which their
susceptibility and resistance reactions in laboratory, greenhouse and field were
apprecciated. In relation to the desinfected barley seed, Maris Otter and Hoppel
were the cultivars which more efficiently transmitted the scald. The infection
frequency in non-desinfected seed was low, due to competition with other fungí.
The cultivars Ark Royal and Astrix of Guinness were more efficient regarding scald
transmission. Under greenhouse conditions scald ocurred ¡n all the cultivars and
those most affected were Ark Royal and Morís Otter, while Astrix from Long
Ashton Research Station was healthy. In field conditions all seeds untreated with
fungicides gave scalded plants and the cultivars most severely attacked were Ark
Royal and Astrix from the station. The study for the mycoflora was done in Great
Britain and in México with barley seeds of both countries.
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