บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Integrated control of sweet cherry storage rots by pre- and postharvest applications of Aureobasidium pullulans, calcium chloride, and sodium bicarbonate

Ippolito A.; Schena L.; Pentimone I. And Nigro F.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.101

2004

บทคัดย่อ

Integrated control of sweet cherry storage rots by pre- and postharvest applications of Aureobasidium pullulans, calcium chloride, and sodium bicarbonate Calcium chloride (CC) and sodium bicarbonate (SB) were selected among 17 salts as the most effective against Botrytis cinerea in in vivo trials o­n wounded sweet cherries. Under the same conditions, the combination of CC and SB with a known biocontrol agent (Aureobasidium pullulans, strain L47) reduced Botrytis rot by 98 and 94% respectively.

Tests with pre and postharvest treatments were conducted in 2000 and 2001 using CC, SB and L47 alone or in combination. In both year trials, postharvest treatments gave significant reductions of rot incidence compared to the control. In particular, the combinations L47 + CC and L47 + SB were the most effective with a reduction of total rots ranging from 62 to 75%. The application of Limpel’s formula proved the presence of a synergistic effect of combined applications of antogonist and salts.

Compared to the untreated control, preharvest applications of the antagonist and salts alone resulted in a significant reduction of rots ranging from 24 to 58%; however, their combined application did not improve the level of control. CC and SB did not show any in vitro toxic effect o­n A. pullulans and did not modify the epiphytic population of yeasts, yeast-like fungi, and filamentous fungi o­n fruit surface. In postharvest applications, the population of the antagonist was not reduced by the presence of salts, whereas, o­n fruits treated before harvest the colony forming units (CFU) of yeast-like fungi was lower o­n fruits treated with a combination of antagonist and salts, compared to fruits treated with the sole antagonist.