ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

High-CO2 for the control of Botrytis cinerea rot during longterm storage of red chicory.

Bertolini P.; Baraldi E.; Mari M.; Chierici E. and Lazzarin R.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.103

2004

บทคัดย่อ

 Red chicory (Cichorium intybus var. Silvestre Bischoff), has been cultivated for a long time in northern Italy. In recent times its production has increased also in Europe, United States and South America due to the marketing success of freshly cut salad mix of which is a basic component. Red chicory is a winter crop and its quality decreases when harvested in late spring and summer, storage technology has potential to extend the marketing season of the heads picked at the best time. However during storage heavy losses are caused by rots, shriveling and senescence. The effects of CO₂-enriched atmospheres o­n the infections of Botrytis cinerea in red chicory cv Radicchio rosso di Chioggia were studied during storage at 0°C for 150 days. B. cinerea growth, conidial germination and sclerotial production were evaluated also in vitro. Mycelial growth o­n PDA decreased linearly with increasing CO₂ concentrations form 5, 10, 15 and 20% CO₂. A reduced production of scleratia in air, by the colonies formerly exposed to various CO₂ and inhibited at 20% CO₂. In artificially inoculated heads, lesion area caused by B. cinecea decreased with increasing concentrations of CO₂, up to 60 days’ storage, later o­nly 10 and 15% CO₂ were really effective, while after 120 days all the concentration tested showed a low efficacy. In naturally infected heads the effect of 5 and 10% CO₂ was remarkable even after 150 days’ storage as it was prevented not o­nly the growth of B. cinerea in each single head but also the spread of the disease to adjacent plant (nesting), thus reducing the overall losses. Phytotoxic effects combined with a higher vulnerability to rots were detected in heads kept at 15% CO₂ for 150 days.