Abstract: Rhizophora mucronata (mangrove) used alone or in combination with Paecilomyces lilacinus significantly suppressed root infection caused by Macrophomina phaseolina, Fusarium solani and Rhizoctonia solani the root-infecting fungi and Meloidogyne javanica, the root-knot nematode in tomato. An R. mucronata-P. lilacinus treatment also improved plant growth. Organic amendments and P. lilacinus used together showed better results in the control of root-rot and root-knot disease complex as compared to their separate use.