The disease incidence (A) and population dynamics (B) of R. solanacearum in soil treated with rapeseed cake compost (RCC), peat2, QL-18, RCC þ QL-18, peat þ QL-18 or no
amendment (CK) on different days post-inoculation. Different letters and asterisks indicate the presence of significant differences (HolmeSidak method; P < 0.05) among the
treatments for a particular day post-inoculation with R. solanacearum.