Evaluation of the antifungal activity of the Iranian thyme essential oils on the postharvest pathogens of Strawberry fruits

Abstract

Postharvest diseases cause considerable losses to harvested fruits and vegetables during transportation and storage. The aim of this study was to evaluate the antifungal potential of Thymus danensis and Thymus carmanicus against four postharvest pathogenic fungi (Rhizopus stolonifer, Penicillium digitatum, Aspergillus niger and Botrytis cinerea) which can reduce the shelf life of strawberry fruit. The chemical composition of plant oils was determined by capillary gas chromatography and mass spectrometry. Antifungal assays were carried out in vitro using PDA plates. Antifungal potential was found for 2 analysed essential oils. T. carmanicus oils have chemical compositions characterized by carvacrol (70%), p-cymene (12.4%) and γ-terpinene (2.5%) as the major components while the major constituents of the T. danensis were thymol (64.8%), α-terpinene (11.3%) and p-cymene (7.9%). Thymus sp. oils showed inhibitory effect even at low concentration (300 µl/L) against B. cinerea and R. stolonifer and showed inhibitory effect against A. niger and P. digitatum at 600 µl/L. Both essential oils tested in vivo at the preliminary concentration exhibited inhibitory activity against the four pathogens.

Microstructural and physicochemical quality maintenance in green bell pepper infected with Botrytis cinerea and treated with thyme essential oil combined with carnauba wax

“…Nabigol and Morshedi (2011) found that TEO delayed the onset of gray mold symptoms in tomatoes and strawberries. Similarly, Gebel and Magurno (2014) observed that gray mold symptoms in untreated strawberries began to appear 3 days after inoculation, whereas in strawberries treated with TEO appeared on day 5.…”

Isolation, Identification, and Antibacterial Testing of Essential Oil from Green Betel Leaf (Piper Betle L.) Using Well Diffusion Method

“…Green betel leaf essential oil was made at different concentrations (25% v/v, 50% v/v, 75% v/v, 90% v/v, and 100% v/v). These concentrations were prepared by diluting pure essential oil with the addition of 0.1 mL of Tween 20 [21]. As a reference, the antibiotic chloramphenicol at 5% w/v was utilized as a positive control, and the Tween 20 solution in distilled water as a negative control.…”

“…Importantly, the well diffusion method is also costeffective. For the negative control, a solution of Tween 20 in distilled water was chosen because Tween 20 functions purely as a solvent and lacks antibacterial properties, ensuring it does not influence the test outcomes [21]. As for the positive control, chloramphenicol, a bacteriostatic antibiotic, was utilized at a concentration of 5%.…”

Thermotherapy combined with alternative products in the management of melon rot caused by Fusarium falciforme

“…Vegetable EOs have remarkable antifungal e cacy. They can be used in ecologically friendly postharvest management and prolong transport and storage periods of fruits in markets (Nabigol et al, 2011;Park et al, 2017). Cu-based products offer an alternative for mitigating issues caused by Fusarium species in melons.…”