Effects of trace elements on the growth of Phellinus pachypholeus pat.

Fifteen trace elements have been tested to determine the requirements for the growth of Phellinus pachypholeus Pat. The fungus requires in ppm, Fe: 10, Zn: 10–100, Mn: 1.0, Cu: 1.0, Mo: 1.0, B: 10.0–100. It does not require Ca, Pb, Br, I, Cr, Hg, W, Li or Cd. Concentrations higher than the optimum were progressively inhibitory for its growth.