Stilbenes are grapevine phytoalexins elicited by biotic and abiotic agents.
Study of resveratrol oligomers in A. carbonarius Negro Amaro infected grape.
Significant increases of viniferins, E-miyabenol C, resveratrol tetramers.
Decrease of glycosides emphasizes the resistance trait of this variety.
Improved knowledge on vine phytoalexin production against this pathogen.