Control of two species of fusarium fungi by medicinal plants

Using medicinal plants essential oils to control or suppress plant diseases causing reduce of undesirable chemical pesticides. In order to study the effect of essential oils on control of two plant pathogens, an experiment was conducted as a three factorial experiment based on randomized complete block design with four replications carried out In-Vitro condition. The factors were including four essential oils of medicinal plants (Lavender, Rosemary, Cinnamon and Eucalyptus) in five concentration (0, 500, 1000, 1500 and 2000 µL/ L) on control of Fusarium oxysporum and Fusarium solani fungi. The results showed that essential oil of Cinnamon can wholly control (100 %) mycelium growth of F. solani fungi in all concentrations, but in F. oxysporum fungi, only in 1500 and 2000 µL/ L of essential oil can control growth of fungus.The least and most of essential oil of lavender (88/5 and 100 %) observed in F. oxysporum and F. solani respectively. The highest of control in F. solani and F. oxysporum by Rosemary was 100 and 46/6 % respectively. The eucalyptus essential oil was the lowest effect on control of fungi. The highest of eucalyptus concentration can with 48 and 49 % inhibitor growth mycelium of F. solani and F. oxysporum respectively. On average, the maximum and minimum control of F. solani fungus observed respectively in cinnamon and eucalyptus essential oils, and in F. oxysporum was in cinnamon and rosemary essential oils. Cinnamaldehyde in cinnamon essential oil is a very strong inhibitor and can be used to control plant fungi.