บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Inhibitory activity of antagonist yeasts against citrus pathogens in packinghouse trials.

Arras, G.; Arru, S.;

Agricoltura Mediterranea Year: 1999 Vol: 129 Issue: 4 Pages: 249-255 Ref: 28 ref.

1999

บทคัดย่อ

Inhibitory activity of antagonist yeasts against citrus pathogens in packinghouse trials.

The fungitoxic activity of antagonist yeasts against postharvest citrus fruit diseases was evaluated. Trials were first performed in the laboratory using yeasts Pichia guilliermondii (strain 5A), Candida oleophila (strain 13L), and Rhodotorula glutinis (strain 21A), and the commercial product AspireTM. Results showed that P. guilliermondii 5A strongly inhibited Penicillium italicum (10% infected wounds) on artificially wounded oroblanco (a hybrid of pummelo and grapefruit) fruits. The other antagonists were less effective, and infected wounds ranged from 38 to 52%, compared to 86% in the control (fruits inoculated with only the pathogen). A pilot test in a Sardinian packinghouse was performed to evaluate the efficacy of the above mentioned microorganisms alone and in combination with 100 ppm thiabendazole (TBZ) in commercial conditions. Infections were mainly due to Penicillium digitatum (95%). The best results were obtained with P. guilliermondii 5A (25% infected fruits) and AspireTM (41%), wit

h respect to the control (untreated, washed fruits) (69%). The other yeasts (13L and 21A) showed negligible results. The addition of 100 ppm TBZ led to the stronger activity of AspireTM and 13L. The use of TBZ alone at the concentrations of 100 and 1200 ppm significantly reduced decay development with respect to the control.