The Antifungal Effect of Potassium Sorbate on Penicillium sp in Labaneh

This study investigated the antifungal effect of polyethylene films coated with potassium sorbate on Penicillium sp. At beginning, we used different concentrations of potassium sorbate in coating the polyethylene films to determine the most effective concentration against Penicillium sp. The concentrations used were (0.0, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.5, 5.0, 5.5 and 6.0%) and 2.5% was the minimum that must be used in packaging Labaneh. Afterward, we tested the effectiveness of four diverse treatments of Labaneh samples. A control sample without coating, samples without coating and inoculated by Penicillium sp, samples coated with polyethylene films that activated by potassium sorbate without inoculation and samples coated with the same films and inoculated by Penicillium sp. The results of the microbial analysis which lasted for 30 days showed that potassium sorbate is an effective antifungal packaging material of Labaneh against Penicillium sp.