Small disks (2 mm diameter) from 1-week
old PDA cultures were placed in 25 ml of sterile liquid
medium containing 1.0 g of KH2SO4, 0.5 g of MgSO4, 6.0 g
of casein hydrolysate, 100 g of sucrose, 1 mg of FeSO4,
0.15 mg of CuSO4, 0.10 mg of ZnSO4, and 0.10 mg of
Na2MoO4 per liter of distilled water.