Table 2. Effects of Bacillus amyloliquefaciens FZB42 and FZB42-Rif on lettuce growth at two different experimental conditions: natural pathogen pressure and additional inoculation of Rhizoctonia solani AG1-IB (+Rs) in the field.

Treatment	Applica-tion mode	SDM [g/plant]	DS
Control	–	26.5	5.0
FZB42	TTA	38.9*	3.0*
FZB42	SA	32.1	3.0*
FZB42	TTA2x	37.2*	3.0*
FZB42-Rif	TTA	36.8*	3.0*
Control +Rs	–	26.4	5.0
FZB42+Rs	TTA	33.0	3.3*
FZB42+Rs	SA	29.9	4.7
FZB42+Rs	TTA2x	34.5*	4.0
FZB42-Rif +Rs	TTA	37.0*	3.0*

Evaluation of the lettuce shoot dry mass (SDM) and disease severity (DS). Numbers followed by an asterisk in one column are significantly different from the corresponding control according to Dunnett’s test procedure P = 0.1 for SDM and according to Kruskal Wallis test P≤0.1 for DS.

TTA – two times application 1 week before planting and 4 days after planting.

SA – Single application 2 days after planting.

TTA2x –two times application with double concentration.