Effect of Pseudomonas spp. strain 20#-5 on Phytophthora infestans.

Effect of different concentration of Pseudomonas spp.strain 20#-5 on the mycelial growth and germination zoospores of Phytophthora infestans indicated that pseudomonas.spp.Strain 20#-5 could inhibit the mycelial growth of Phytophthora infestans on potato,tomato and tobacco.Effect of 2.86 % fermented broth could reach higher than 60 %.High concentration of fermented broth suppressed growth of mycelial than killed them.The effect of inhibition was obvious on the germination zoospores of Phytophthora infestans.In experiment of pot culture,strain 20#-5 took a better action on protection than on control of Phytophthora infestan especially by living bacteria.