Naslov
Quantification of the toxicity of aquaeus chlorine to spores of Penicillium digitatum and Geotrichum citri-auranti.

Autori
Smilanick, Joseph.L. ; Aiyabei, Jonah ; Mlikota Gabler, Franka ; Doctor, J. ; Sorenson, D.

Izvornik
Plant Disease (0191-2917) 86 (2002); 509-514

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Sažetak
Chlorine toxicity to Penicillium digitatum and Geotrichum citrii-auranti, causes of green mold and sour rot, respectively, was quantified. In 3% wt/vol NaHCO3 containing 200 micrograms free chlorine per ml at pH 8.3, 95% of Penicillium digitatum spores died (LT95) by 180 s at 5 oC, while only 32 s were required at 24oC. The LT95 of G. citri-aurantii atrhrospores was 108 and 31 s at 5 and 24oC, respectively. Mortality slowed 2- to 4-fold for each unit of increase from pH 7 to 10. The LT95 of Penicillium digitatum spores in 200 micrograms free chlorine per ml at 24oC at pH 7, 8, 9, and 10 was 13.2, 19.1, 29.4, and 88.4 s, respectively. Models were prepared describing mortality. Brief immersion in 200 micrograms free chlorine per ml reduced viable spores of P. digitatum and G. citri-aurantii from 100000 to 1000 spores per lemon, and naturally occuring yeasts and molds from 1000000 to 1000 CFU. In fruit wound-inoculated and immersed 24 h later in water, 4000 micrograms free chlorine per mL, or 3% wt/vol NaHCO3, green mold occurence after storage was 98.5, 68.3 and 7.5% respectively.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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