Metschnikowia fructicola is an effective biocontrol agent of postharvest diseases of grapes. It can antagonize Botrytis cinerea on several crops. The aim of our work was to investigate the interactions between grape protected by M. fructicola and the grapevine moth Lobesia botrana. The egg laying preference of L. botrana was tested in a dual choice oviposition test. Biocontrol efficacy of M. fructicola against B. cinerea was evaluated on berries artificially inoculated with the pathogen. M. fructicola significantly controlled B. cinerea when applied before the artificial inoculation of the pathogen. Females of L. botrana preferred to lay their eggs on a healthy grape rather than on a grape inoculated with M. fructicola. B. cinerea infected berries were slightly attractive, less then healthy ones. Under the conditions of these experiments M. fructicola acted both as a biocontrol agent of B. cinerea and as a repellent towards L. botrana.
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