Progress from greenhouse trials to field trials has
been described as an important step to achieve practical
applications of induced resistance elicited by PGPRs.
Several Bacillus spp. strains, which first demonstrated
efficacy in reducing disease in greenhouse trials, have
been tested under field conditions (Kloepper et al.
2004). We tested the potential of B. subtilis IAB/BS03
in open field lettuce against B. lactucae. Our results