The indoor experiment was conducted to study the control effects of ethanol and water extracts from garlic on Ralstonia solanacearum . The results showed that garlic extracts could effectively inhibit Ralstonia solanacearum , the inhibition effects improved with the extracts' concentration, particularly the ethanol extract. The inhibition rates of ethanol extracts at the concentrations of 0.2, 0.3 and 0.4 g·mL-1 were 65.56%, 69.26% and 75.93%, respectively; while those of water extracts at the concentrations of 0.3 and 0.4 g·mL-1 were 61.85% and 72.59%, respectively; and the EC50 of water and ethanol extracts were 0.14 g·mL-1 and 0.08 g·mL-1, respectively. Therefore, garlic might be used as a source of plant protectant in Ralstonia solanacearum control.