Species composition of fusarium root rot of spring triticale and the influence of hydrothermal conditions on the frequency of occurrence of fungi of the genus Fusarium

Abstract

Studies on the species composition of Fusarium Root Rot of spring triticale that were carried out in 2015–2022 showed that the dominant species from the complex of fungi of the genus Fusarium is the fungus F. equiseti with a frequency of occurrence of 30,5 % in the growth stage Flowering halfway (GS 65) and 31,9 % in Soft dough (GS 85). The frequency of occurrence of the fungus F. oxysporum was 23,6 % (GS 65) and 16,0 % (GS 85), F. solani – 13,7 % (GS 65) and 11,5 % (GS 85), F. culmorum – 10,2 % (GS 65) and 11,3 % (GS 85), F. avenaceum – 5,1 % (GS 65) and 8,9 % (GS 85). For the fungus F. avenaceum in GS 65, there was a negative correlation (r=−0,82) between the frequency of occurrence of the fungus and the amount of precipitation that fell during the period from sowing to growth stage Flowering halfway, and for the fungus F. culmorum there was a positive correlation (r=0,72) for the same period.