Investıgatıon of control possıbılıtıes of seed borne Alternaria alternata wıth essentıal oıls ın saınfoın feed plant

In this study, antifungal activities of essential oils of thyme (Thymus vulgaris), eucalyptus (Eucaliptus globulus), laurel (Laurus nobilis), myrtle (Myrtus communis) and sage (Salvia officinalis) plants were investigated in vitro conditions against Alternaria alternata (Fr.) Keissl. For this purpose, doses of 1 μl/petri, 10 μl/petri, and 50 μl/petri were used in vitro conditions. Essential oils were dropped on sterile culture antibiogram disc papers with automatic micropipettes. Petri dishes sealed with parafilm were incubated for 8 days at 22±2 °C. Measurements were made after completion of the incubation period and percent inhibition of mycelial growth was determined. At the end of this study, essential oils of thyme, eucalyptus, laurel myrtle and sage showed 100%, 94.21%, 84.92% 80.64% and 43.46% antifungal effects against A. alternata at 50 μl/petri doses, respectively. It was observed that there was no difference in suppression of fungal the pathogen between 1 μl/petri and 10 μl/petri doses of all essential oils included in the experiment. The essential oils of thyme, eucalyptus, myrtle, laurel and sage showed antifungal effects at 1 μl/petri and 10 μl/petri doses against A. alternata at 99.80%, 63.57%, 58.78%, 56.78%, and 37.68% , respectively. In this research, data that can shed light on in vivo studies with nature-friendly essential oils were obtained.