Improvement in the biocontrol of postharvest diseases of apples with the use of yeast mixtures
Juan Calvo, Viviana Calvente, María Edith de Orellano, Delia Benuzzi and Maria Isable Sanz de Tosetti
BioControl 48 (5): 579-593. 2003.
2003
บทคัดย่อ
Improvement in the biocontrol of postharvest diseases of apples with the use of yeast mixturesMixtures of yeasts were tested for their ability to control Penicillium expansumand Botrytis cinerea on Red Delicious apple fruits. The occurrence of synergistic or antagonistic interactions between yeast strains in different mixtures was also evaluated. Two strains of Rhodotorula (R. glutinis SL 1 and R. glutinisSL 30) and two strains of Cryptococcus (C. albidus SL 43 and C. laurentii SL 62) were selected for developing yeasts mixtures.The R. glutinisSL 1–R. glutinis SL 30 mixture exhibited a lower effectiveness than each strain alone, against both moulds. Other mixtures (R. glutinis SL 1–C. albidus SL 43 and R. glutinis SL 30–C. albidus SL 43) showed synergism against P. expansum but not against B. cinerea. The R. glutinis SL 1–C. laurentii SL62 mixture was the only mixture which showed synergism against gray mould. There was not any mixture, which showed high effectiveness against both moulds at the same time. Different results could be explained by the dynamics of the population of the yeasts.By using yeast mixtures, it was possible to improve biocontrol without increasing the amount of antagonists applied. The synergism observed could be useful in enhancing biological control.