Abstract: Endophytic bacteria presented in plants can stably develop and propagate. Tobacco black shank (Phytophthora parasitica var. nicotianae) is a severe disease of tobacco. We selected endophytic bacteria to control tobacco black shank and obtained strains 118, 57 and 93. Their control effects were 69.23%, 61.53% and 65.38% in the greenhouse, respectively. Strain 118 can restrict the growth of hypha of P. parasitica var. nicotianae . Furthermore, strain 118 can restrain the growth of several main pathogenetic fungi of tobacco on plates and can promote the growth of tobacco.

Key words: Tobacco black shank, Endophytic bacteria, Biocontrol