Figure 4:Lead content of substrates composed of peanut shells (PS) and cornstalks (CS) before (day 0) and after (day 120) solid state fermentation by P. ostreatus. Cont1-100PS and Cont2-100CS are controls composed of 100% peanut shells and 100% cornstalks respectively. ND=Not detected. Bars with same letters are not significantly different (p<0.05).