Sensitivity of micromycetes of the genus Fusarium Link, causative agents of rot of the core of apple fruits, to the active substances of modern fungicides

Abstract

As a result of the studies, species-specific reactions of strains of the genus Fusarium Link of relative sensitivity to the active substances of chemical fungicides, in vitro, were noted. The drugs showed both very high biological effectiveness (BE) (100%) and very low (0 %). In suppressing the species F. sporotrichioides, the best result was shown by a mixed preparation based on fluopyram and pyrimethanil, as well as single-component - mefentrifluconazole and cyprodinil, for the species F. oxysporum - all three mixed preparations: fluopyram + pyrimethanil; tebuconazole + fluopyram and thiram + difenoconazole. It can be preliminarily concluded that the same active substances and their mixtures exhibit unequal activity against different strains of the same species from the genus Fusarium, the causative agent of apple core rot.