ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Control of postharvest diseases in longan fruit by ozone

Whangchai K.; Saengnil K. and Uthaibutra J.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.109

2004

บทคัดย่อ

To determine the effects of ozone treatment o­n longan postharvest pathogen, cultures of Lasiodiplodia sp. and Cladosporium sp. o­n potato dextrose agar were exposed to 200 ppm of ozone. The ozone gas was applied for both fumigation to mycelia (gaseous ozone), and passing through spore suspension (ozonated water) for 15, 30, 60 and 120 minute. The fungal colonization, spore size, spore germination and microscopic observation of the fungi were investigated.

It was found that ozonation at longan exposure time was more effective to inhibit fungal colonization and spore germination. Moreover under microscopic observation, abnormal mycelia after fumigation with ozone was obviously observed. Therefore, the application of ozone could be considered as a possible method to control postharvest decay and prolong storage life of longan fruit.