Influenza dell'1-Mcp sulla conservazione dei frutti

Con la presente ricerca, di durata biennale, \ue8 stata verificata l\u2019efficacia dell\u20191-MCP sulla maturazione delle susine Fortune e Angeleno, dopo conservazione in Refrigerazione Normale (RN) a 0\ub0C e successivo periodo di \u201cshelf-life\u201d a 20\ub0C. Inoltre \ue8 stato valutato l\u2019effetto dell\u20191-MCP sul RSR, sullo sviluppo dei marciumi, causati da M. laxa e sul disfacimento interno dei frutti

Riduzione del contenuto di patulina nelle mele mediante trans-2-esenale

Sono state condotte prove per verificare in post-raccolta l\u2019effetto del trans-2-esenale sul marciume verde-azzurro e sul contenuto di patulina delle mele. Il trans-2-esenale, applicato alla dose di 5 o 12,5 l/l ha fortemente ridotto, rispetto al testimone, le infezioni di Penicillium expansum e il contenuto di patulina nelle mele

Influenza dell'1-MCP sulla conservazione delle susine

Dall\u2019esame complessivo dei risultati \ue8 emerso che l\u20191-MCP, applicato alla raccolta, alle dosi di 300 o 500 ppb a basse temperature, ha ritardato la maturazione dei frutti durante la shelf-life a 20\ub0C, dopo conservazione in RN a 0\ub0C. L\u20191-MCP non ha avuto alcuna influenza sul RSR e sul contenimento dei marciumi di M. laxa, mentre ha ridotto fortemente il disfacimento interno delle susine

Activity of natural compounds on Fusarium verticillioides and fumonisin production in stored maize kernels

The ability of trans-2-hexenal, carvacrol and eugenol to control F. verticillioides was explored in vitro and in artificially infected kernels. The effect of the trans-2-hexenal fumigation on F. verticillioides control, fumonisin production and kernel germination was also investigated in naturally infected kernels. Trans-2-hexenal, carvacrol and eugenol vapour showed fungicidal activity against F. verticillioides, in in vitro trials. Trans-2-hexenal was the best pathogen inhibitor, followed by carvacrol and eugenol. In maize kernels, fumigations with trans-2-hexenal provided a high inhibitory effect on F. verticillioides growth and its efficacy depended on concentration and time of incubation. Reduction or delay in the germinability of the kernel were observed after trans-2-hexenal exposure. The results showed that trans-2-hexenal postharvest fumigation is effective in F. verticillioides control also in asymptomatic maize kernels, but cannot reduce fumonisin production

Some factors influencing patulin production by Penicillium expansum in pome fruits

The objective of our study was to examine the effects of Penicillium expansum on patulin production in relation to isolates, species and cultivar type, incidence and severity of decay. In addition, patulin production at different incubation times and its diffusion were also investigated. These factors were evaluated in pome fruits inoculated with P. expansum and kept at 20 \ub0C for short periods of time. The ability of five P. expansum isolates to grow and produce patulin in inoculated Golden Delicious apples varied among the strains from below the limit of quantification to 662 μg kg-1. Variety and species of pome fruits influenced patulin production. P. expansum isolate PE97.IT produced a higher patulin content in apples than in pears. The highest patulin production was 386 μg kg-1 in Golden Delicious. No blue mould symptom appeared in pears inoculated with P. expansum and no patulin was detected after 3 days at 20 ◦C. However, patulin increased with incubation time after 6 and 8 days. No patulin was detected in healthy pear tissue but it was high in the decayed area. Since patulin production is associated primarily with infected rotten tissue, patulin control is possible by using healthy fruits, sorting damaged and rotten fruits before processing

Some factors influencing patulin production by Penicillium expansum in pome fruits

The objective of our study was to examine the effects of Penicillium expansum on patulin production in relation to isolates, species and cultivar type, incidence and severity of decay. In addition, patulin production at different incubation times and its diffusion were also investigated. These factors were evaluated in pome fruits inoculated with P. expansum and kept at 20 °C for short periods of time. The ability of five P. expansum isolates to grow and produce patulin in inoculated Golden Delicious apples varied among the strains from below the limit of quantification to 662 μg kg-1. Variety and species of pome fruits influenced patulin production. P. expansum isolate PE97.IT produced a higher patulin content in apples than in pears. The highest patulin production was 386 μg kg-1 in Golden Delicious. No blue mould symptom appeared in pears inoculated with P. expansum and no patulin was detected after 3 days at 20 ◦C. However, patulin increased with incubation time after 6 and 8 days. No patulin was detected in healthy pear tissue but it was high in the decayed area. Since patulin production is associated primarily with infected rotten tissue, patulin control is possible by using healthy fruits, sorting damaged and rotten fruits before processing