One hundred and thirty five strains of Ralstonia solanacearum fiom 15 different host plantswere test for bacteriocin productivity by using strains Tm46, Tb32 and M1 as indicators. Strains Tm46,Tb32 and M1 were highly virulent to tomato, tobacco and mulberry respectively. The results indicatedthat about 43. 7% of the isolates tested were able to produce bacteriocin in PSA agar medium with different specificities. Some strains such as Tm3, Tb30 and Eu1 had relatively wide inhibiting spectrum.These results would be useful to search for biological control agents of plant bacterial wilt caused by Ralstonia solanacearum.