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Copper citrate is a complex compound of copper, which is characterized by a higher degree of dissociation in relation to the other copper compounds that are presently in the use and can be used in lower concentrations for the control of plant pathogens. Apple scab (Venturia inaequalis) is on of the economically most important diseases of apples in all regions where this fruit species grown. A successful apple production is not possible without intensive chemical control. The use of copperbased products to protect apples, positioned at the start of the growing season. The earliest apple infections are the most destructive, and the effective protection of the apples in this period is very important. The aim of this study was to evaluate in vitro the influence of copper citrate at different concentrations applied to the growth of V. inaequalis colonies. The results show that copper citrate in significantly lower concentrations of application 0.2 and 0.1 % higher than the standard product, effectively inhibiting the growth of V. inaequali mycelium (colony), which is the result of significantly higher amounts of copper ions, that is released from compound. Bakar-citrat je kompleksno jedinjenje bakra koje se odlikuje višim stepenom disocijacije u odnosu na druga bakarna jedinjenja koja su trenutno u primeni pa se može koristiti u nižim koncentracijama za suzbijanje biljnih patogena. Čađava pegavost lista i krastavost plodova (Venturia inaequalis) je jedna od ekonomski najštetnijih bolesti jabuke u svim regionima gde se ova voćna vrsta gaji. Uspešna proizvodnja jabuke nije moguća bez izvođenja intenzivnih hemijskih mera zaštite. Primena preparata na bazi bakra u zaštiti jabuke, pozicionirana je na sam početak vegetacije. Najranije zaraze jabuke su i najdestruktivnije, pa je efikasna zaštita jabuke u ovom periodu veoma važna. Cilj ovog rada je da se u in vitro uslovima ispita uticaj bakar-citrata u različitim koncentracijama primene na porast kolonija Venturia inaequalis. Dobijeni rezultati pokazuju da bakar citrat u znatno nižim koncentracijama primene 0,2 i 0,1% nego sandardni preparat, efikasno blokira porast micelije (kolonija) fitopatogene gljive V. inaequalis, što je rezultat znatno veće količine bakarnih jona koje ovo jedinjenje oslobađa.