Biological control of bacterial wilt of potato induced by Pseudomonas solanacearum E.F. Smith.
Potato seedlings were grown in sterile soil in a growth chamber. When the seedlings were 8 cm high, the soil was inoculated with suspensions of Pseudomonas fluorescens (str. BC8) and, 15 d later, P. solanacearum. Both species became established in potato tissues. Prior inoculation with P. fluorescens protected 90% of seedlings from P. solanacearum and caused no deleterious effects on plants.