تأثیر نانواکسید مس و تیتانیوم و اسانس مرزه و شوید بر کاهش بیماری پوسیدگی نرم سیب‌زمینی در شرایط انبار

Soft rot caused by pectobacteria is one of the important and common potato diseases in Iran and the world. Prevention of tuber contamination during storage is one of the concerns of producers of this agricultural product. Biological compounds and nano-based compounds can be solutions to reduce tuber contamination during the storage process. Therefore, to investigate the efficiency of copper and titanium nano oxides, as well as Dill (Anethum graveolens) and Savory (Satureja hortensis) essential oils, on reducing the incidence of contamination of tubers stored in storage, a study was conducted in the form of a completely randomized design with eight treatments including Savory essential oil, Dill essential oil, copper nano oxide, and titanium nano oxide. Also, combining the mentioned nanoparticles with the essential oils of the two mentioned plants was designed and implemented in four repetitions. With the disc diffusion method, the highest growth inhibition diameter was assigned to treating Savory and copper nano oxide with 40 mm. In the study of the efficiency of the studied compounds in warehouse conditions, which was done by spraying the tubers with a water-soluble liquid formulation (for essential oils) and a water-soluble powder (for nanoparticles), the results showed that the use of copper nano oxide with a minimum bactericidal concentration (MBC) of 31.25 μg/ml, titanium nano oxide with an MBC of 62.5 μg/ml, and Savory essential oil with an MBC of 125 μg/ml had a significant effect on reducing the incidence of soft rot symptoms in the tubers and were placed in the same group with the negative control; So that the application of Savory essential oil, both alone and in combination with copper nano oxide, completely inhibited the soft rot disease in potato tubers. The effect of titanium nano oxide in combination with plant essential oils decreased the inhibitory capacity compared to the negative control in storage conditions. Using Dill essential oil with an MBC of 62.5 μg/ml could not prevent the incidence of soft rot symptoms. According to this study's results, using Savory essential oil alone and in combination with copper nano oxide can be suggested to prevent soft rot disease in the potato warehouse.