Phytotoxins produced by and , associated with grapevine trunk diseases (GTDs) in Iran.

and associated with grapevine trunk diseases (GTDs) in Iran, were grown to evaluate the production of phytotoxic metabolites as potential pathogenicity determinants. 2,5-Dihydroxymethylfuran and (+)-6-hydroxyramulosin were isolated from the culture filtrates of and , respectively. They were identified by physical and spectroscopic (essentially 1 D and 2 D H and C NMR and ESIMS) methods and X ray analysis. Both compounds induced significant necrosis and curling on the leaves of the host plant L. and the effects were concentration dependent. No effect was observed on the leaves of the non-host L.. plant.