Non-autoclaved poultry litter and soil are efficient in controlling Scytalidium lignicola growth, the causal agent of cassava black root

ABSTRACT Cassava root rot caused by Scytalidium lignicola has become an important disease for producing states due to large production losses. Thus, the aim of this study was to evaluate the effect of sources and levels of organic matter alone and added to sandy soil under suppressiveness to S. lignicola CMM 1098 mycelial growth. Two experiments were conducted, the first one was to evaluate the effect of organic extracts (poultry litter, goat manure, cattle and earthworm excrements) added to the culture medium potato dextrose agar (PDA) at different concentrations (10, 20, 30 and 40%) (v / v), while the second experiment was to evaluate the effect of organic materials mixed with sandy soil, using the same sources and concentrations. The source poultry litter was most effective in inhibiting the mycelial growth of S. lignicola at a concentration of 40%, inhibiting the mycelial growth by 69.75% only when extracts were not autoclaved. Non-autoclaved poultry litter at levels starting from 30% was efficient in suppressing S. lignicola CMM 1098 mycelial growth. Non-autoclaved sandy soil added to different sources and levels of organic matter is highly efficient for suppressiveness to S. lignicola CMM 1098 growth.