HPLC-UV chromatograms at 210 nm from mono cultural barley-malt agar extracts of MUCL 47152 (H. rubiginosum), STMA 18166 (Hym. fraxineus), STMA 13090 (H. fuscum) and one dual culture experiment thereof. UV/Vis spectra are shown for phomopsidin (5), 10-hydroxyphomopsidin (6), orthosporin (9), daldinone B (10), 1,8-dimethoxynaphthalene (11), daldinin F (12), 5–methylmellein (13), viridiol (14) and an unidentifiable compound (UC 6) after comparison of data with internal databases. The UV signal of UC 6 was enhanced in the dual culture extract.