Ochrona róż przed Diplocarpon rosae mieszaniną fungicydów z olejami

The study evaluated the efficacy of Amistar 250 SC, Discus 500 WG and Score 250 EC, applied at concentrations according to their labels/instructions for use, and also reduced by 50% with the addition of one of the oils: Atpolan 80 EC, Olejan 85 EC, rape seed oil, in the protection of roses against Diplocarpon rosae. The fungicides and their mixtures with oils were used in open field conditions for spraying rose shrubs 9 times at 7-day intervals. The study found no significant effect of oils addition to the working liquid on improving the fungicide efficacy of roses protection against black spot. However, in view of the extended mechanism of the tested mixtures action against the pathogen, their use in practice seems to be the most appropriate. There were no phytotoxic effects of the tested fungicides and their mixtures with oils on the cultivars, on which the experiments were conducted.