Evaluation of bioformulation of Enterobacter sp. UPMSSB7 and mycorrhizae with silicon for white root rot disease suppression and growth promotion of rubber seedlings inoculated with Rigidoporus microporus

White root rot (WRR) disease, caused by Rigidoporus microporus, is one of the major constraints causing economic loss to rubber plantation worldwide including in Malaysia. This glasshouse study was conducted evaluate efficacy a peat-based bioformulation Enterobacter sp. UPMSSB7 and an arbuscular mycorrhizal fungus (AMF, Glomus mosseae) with silicon (Si) for WRR suppression plant growth promotion seedlings. Results revealed that tested significantly (P < 0.0001) reduced disease compared positive control while, not different than propiconazole, triazole fungicide. The lower values incidence, severity foliar symptoms, area under progress curve, pathogen colonization higher value reduction were recorded both fungicide treated seedlings treatment 24 weeks after inoculation R. microporus. indicated pathogen-inoculated had increased stem height, girth size, chlorophyll content, leaf area, shoot dry weight, total length, volume surface (103.8 cm, 8.08 mm, 56.62 SPAD value, 3534.8 cm2, 37.04 g 36.76 g, 1617.7 24.15 cm3 402.97 respectively) as treatments. also content (18.56 kg−1 27.61 kg−1, well nutrient (N, P, K Ca) contents (3.89%, 0.19%, 1.06% 0.57%, population (1.1 × 108 cfu g−1 soil) non-inoculated bioformulation. AMF spore density or without From this study, it concluded (Glomus Si could be potential approach suppress improve