Development of tan spot depending on winter wheat species and genotype
2022
BimsteineBimšteine, Gunita, Gunita | Rutenberga-AvaRūtenberga-Āva, Anda, Anda | SvartaŠvarta, Agrita, Agrita | KanepsKaņeps, Jānis, Janis
Soft wheat (Triticum aestivum) is traditionally grown in Latvia, however, recently also other subspecies (e.g. T. aestivum ssp. spelta) or species of durum wheat (T. durum) have been grown. Spelt wheat is considered more suitable for growing in organic farming systems because its grain is more protected from infection with tan spot. Tan spot (caused by Pyrenophora triticirepentis) is the most important wheat disease not only in Latvia, but also in other wheat growing regions. The aim of this study was to describe the influence of a particular winter wheat genotype or a species selected for cultivation on the development of tan spot. The disease development was evaluated for 17 winter wheat genotypes – both for T. aestivum (14 genotypes) and T. aestivum ssp. spelta (three genotypes). The growing season of 2022 was very favorable for the development of tan spot, and the calculated AUDPC values exceeded 400 units. The study suggests that both the winter wheat species and the cultivated genotype have a significant effect on the incidence of tan spot.
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