Rhizoctonia solani is one of the most serious and widespread diseases of potatoes in Australia. The fungus attacks underground stems, roots and tubers, resulting in plant death and yield reductions of up to 30%. This project aimed to improve potato skin quality by controlling R. Solani and other major soilborne fungal diseases in Australia. Extensive laboratory, glasshouse and field experiments were conducted over three years to evaluate the efficacy of several antagonistic fungi and bacteria for the control of soilborne inoculum.