ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Postharvest application of the yeast Cryptococcus laurentii reduces fruit rots of apples

Blum L.E.B.; Amarante C.V.T. do and Valdebenito-Sanhueza R.M.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.108

2004

บทคัดย่อ

Rots might be responsible for substantial postharvest losses o­n apples (Malus domestica). The blue mold caused by Penicillium expansum, the bitter rot caused by Glamerella cingulata, and the ‘bull’s-eye rot’ induced by Pezicula malicorticis are among of the most common rots. Great attention has been given to loss environmental damaging alternatives for the control of postharvest diseases. The postharvest application of east-like fungi, such as Cryptococcus laurentii, is o­ne of the options to control fruit rots. This study was carried out to test the efficiency of C. laurentii o­n fruit rots control in ‘Fuji’ and ‘Gala’ apples.

After application of treatments, by immersion, the fruits were stored in laboratory (15-20°C / 60-70%RH) or in cold storage (1°C / 90-95%RH). The pathogens were applied at the concentration of 102 connidia mL^-1, the yeast at 107 cells mL^-1, and the fungicides at 50 mg (a.i.) L^-1. Cryptococcus laurentii was as efficient as the fungicides (thiabendazole and iprodione) to reduce apple fruit rots (G. cingulata, P. expansum, and P. malicorticis). In cold storage trials, C. laurentii was as efficient as the fungicides (thiabendazole, iprodione, chlorhexidine digluconate, sodium dichloro-s-triazinetrione, sodium dicloroisocyanurate, and sodium hypochloride) to reduce P. expansum fruit rot. The application of Cryptococcus laurentii did not affect flesh firmness and total soluble solids content (°Brix) of the fruits.