Assessment of the Suitability of 10 Winter Triticale Cultivars (x Triticosecale Wittm. ex A. Camus) for Organic Agriculture: Polish Case Study

The aim of the study was to compare 10 winter triticale varieties according to their traits useful for cultivation in organic farming. The study was carried out in the years 2014–2017 in the experimental organic farm of the Institute of Soil Science and Plant Cultivation–State Research Institute in Pulawy (Poland). The highest-yielding varieties under organic conditions were Pizarro and Subito. Borowik cultivar showed the highest competitive ability against weeds. The highest number of weeds was found in the Leontyno cultivar, which was connected to the lowest plant density, the lowest weight of the above-ground parts of the canopy and smaller value of tillering coefficient. The most affected by the fungal pathogens Drechslera tritici-repentis (Died.) Shoem. and Puccinia striiformis Schwein. were Fredro and Algoso. Cluster analyses indicated that the most useful cultivars for cultivation in the organic system were: Borowik, Subito, and Tomko, which all showed higher yielding potential, bigger competitiveness against weeds, and average resistance against fungal pathogens. Pizarro, Tulus, and Twingo, which showed high resistance to fungal pathogens with lower competitiveness to weeds, were classified to the second group of usefulness. The least useful for the organic system were: Algoso, Fredro, Grenado, and Leontyno.