Ozone was extensively
evaluated to control postharvest pathogens and its use presents commercial
interest since it is considered an innocuous substance free of residues. In
Tucuman (Argentina), research carried out on this technology in citrus is
scarce. In this paper the ozone effectiveness to control citrus green mold (Penicillium digitatum) (Pd) was evaluated. In vitro and in vivo tests were conducted in storage room. Petri dishes with potato dextrose agar
(PDA) with and without Pd disks, were exposed to ozone (0.05 ppm) at 5 and 12
°C, at two different height of 0.10 and 1.5 m, for 8, 24 and 48 hs. Wounded and
artificially inoculated lemons were kept in the same storage room. In other
tests, artificially inoculated lemons were stored in three open boxes and six export
boxes, separately. Fruit were evaluated on the 7th, 14th, and 21st days after
treatments. These same treatments were conducted in another room without ozone
as control. The average diameter and the number of Penicillium digitatum colonies grown in vitro were inversely proportional to the ozone exposure time,
showing that this gas reduced the environmental contamination after 24 hs of
exposure. The incidence of the disease in inoculated lemons was similar in both
storage rooms, whereas in wounded fruit the infection was inversely
proportional to the exposure time to ozone. Results showed that disease
severity was low when ozone was used, even though the incidence was high. The
ozone static effect was higher when fruit was in direct contact with the gas.
How to cite this paper
Ozone Effect to Control Lemon Postharvest Diseases in Storage Chamber
Sepúlveda Tusek M1, Faria F 2, Torres Leal G2, Ramallo J1
1Laboratorio de Desarrollo e Investigación, SA San Miguel, Lavalle 4001, T4000BAB – San Miguel de Tucumán, Argentina.
2Estación Experimental INTA Famaillá, Tucumán, Argentina.
Corresponding author: Torres Leal, G.J, Estación Experimental INTA Famaillá, Tucumán, Argentina.
How to cite this paper: Sepúlveda, T.M., et al. (2018) Ozone Effect to Con-trol Lemon Postharvest Diseases in Storage Chamber. The Journal of the Science of Food and Agriculture, 2(2), 35-39.