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Seed disinfestation by ozone treatments. (Abstract in rivista)

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Ciccarese F., Sasanelli N., Ziadi T., Gallo M., Papajova I. (2007)
Seed disinfestation by ozone treatments.
in SIPaV XIV NATIONAL MEETING, Perugia, 2007
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Journal of Plant Pathology, 89(3, supplement), S14. SIPaV XIV NATIONAL MEETING - Perugia, 19-21 September 2007. (literal)

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Seed contamination by fungi may be dangerous both when seeds used for sowing or when they are stored for human or animal consumption. Several diseases of horticultural crops derive from infected seeds that act as carriers of infections. For each plant species at least a seed-transmitted disease is known. Superficial contamination during storage and marketing of seeds intended for human or animal consumption derives from infections contracted in the field primarily by saprophytic fungi as Aspergillus spp. and Penicillium spp. that produce dangerous metabolites for human or animal health (aflatoxin B1, B2, G1, G2, M1 and ocratoxin A). This work reports the results of two experimental trials using ozone treatments for seed disinfestation. A trial concerned seeds of a local pea variety obtained in Southern Italy from farmers, who produce their own seed. The second trial was carried out on 1-year-old stored wheat kernels cv. Cappelli, for industrial use. In both experiments ozone at 120 ppm concentration was applied as a mixture of ozone + air for 1, 1.5 and 3 min. Untreated seeds were used as control. Treated and untreated seeds were plated on PDA in Petri dishes for 4 days. The developed fungi were identified and counted. Fusarium oxysporum, Alternaria alternata and Penicillium spp. were frequently observed. The longest exposure time to ozone was effective in seed disinfestation without influencing germination. (literal)

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