Community Research and Development Information Service - CORDIS

Role of farming methods and meteorology on ochratoxin A content in grapes at harvesting

The most relevant variables to discriminate low and high incidence of black aspergilli in vineyards were soil type and grape variety. The most favourable soil for high incidence was clay and local varieties grown in France, Greece, Italy, Portugal and Spain resulted in higher susceptibility. Further studies are necessary to define the role of grape variety because this result regards mainly local varieties and the reason for higher susceptibility was not found.

Data on the role of pests and diseases are limited, and they were not enough to be included in the statistical analysis, but a good management of them in vineyards certainly guarantees a relevant decrease in OTA content at harvesting, as demonstrated in several trials. The main disease able to favour A. carbonarius is powdery mildew but a major role is played by Lobesia botrana comparing neighbouring vineyards, managed with different approaches to crop protection. Specific sprays to control black aspergilli are possible and the mixture cyprodinil+fludioxonil gave the most promising results.

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Università Cattolica del Sacro Cuore
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