Phytopathologia Mediterranea (2000) 39, 357-365

Mazzullo Alessandro, Stefano Di Marco, Fabio Osti and Augusto Cesari (2000)
Bioassays on the activity of resveratrol, pterostilbene and phosphorous acid towards fungi associated with esca of grapevine
Phytopathologia Mediterranea 39 (3), 357-365
Abstract: An examination was carried out under laboratory conditions to determine whether resveratrol, pterostilbene and mixtures of each stilbene with phosphorous acid had an inhibitory activity against some fungi involved in esca: Phaeoacremonium aleophilum, Phaeomoniella chlamydospora, Libertella blepharis (anamorph of Eutypa lata), Fomitiporia punctata and Stereum hirsutum. An inhibition of mycelial growth by resveratrol was not found but there was a clear correlation between pterostilbene concentration and reduction of radial growth confirming the antifungal activity of this phytoalexin. Although phosphorous acid proved to be generally ineffective, an increase of antifungal activity of stilbenes in the mixtures was observed with all fungi except F. punctata. The possible relation between fungal phenol oxidase activity and inhibition by mixtures of stilbenes and phosphorous acid was discussed.
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Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Eutypa lata	Grapevine (Vitis)
	Stereum hirsutum	Grapevine (Vitis)
	Phaeoacremonium minimum	Grapevine (Vitis)
	Fomitiporia punctata	Grapevine (Vitis)