Community Research and Development Information Service - CORDIS

Dynamic of OTA presence in grapes

Sampling managed before ripening confirmed the absence of OTA till to veraison, also when it was relevant at harvesting. This is a relevant point because the period veraison- ripening can be definitely considered crucial for OTA accumulation in grapes.

OTA is a problem that originates in the vineyard. Damaged berries, by abiotic and/or biotic causes, are a favourable substrate; in fact, the efficiency of black aspergilli in producing OTA increases when wounds favour grape invasion. OTA is detected in symptomless bunches, but mouldy berries are associated with higher toxin levels.
Because the period between early veraison and harvesting is considered as crucial, factors able to influence fungal growth and OTA synthesis, in particular meteorological conditions, need to be monitored carefully at this time. This period is slightly different in different countries; a delay was noticed in Europe respect to Israel.

Data obtained during the field sampling were a very good base for further studies and data analysis mainly finalised to the development of a Decision Support System (DSS) to minimise OTA content in grapes.

Reported by

Università Cattolica del Sacro Cuore
Via Emilia Parmense 84
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