EFFECTS OF PRUNING WOUND PROTECTION PRODUCTS ON GRAPEVINE WOOD STILBENES.

The increasing incidence of grapevine trunk diseases (GTDs) is mainly linked to the lack of effective control and mitigation strategies providing adequate protection. The most common field control and mitigation strategies to contain of grapevine trunk diseases are preventive measures, such as the application of plant protection products on pruning wounds. However, plant protection products can influence plant secondary metabolism, and this interference may be decisive in countering pathogen attacks. The goal of the study was to understand whether and how fungicides may affect the accumulation of stilbenes in fruiting-cane pruning wounds, to evaluate the grapevine ability to activate natural defense mechanisms, in response to treatments.