Table 1.

Suppression of Pythium-induced damping-off and root rot in cucumber by Pseudomonas chlororaphis subsp. aurantiaca StFRB508 and 508ΔPACI.

Bacterial strain addeda	Pythium addeda	Surviving plants per flask (%)b
None	−	100 a
StFRB508	−	100 a
508ΔPACI	−	100 a
None	+	21 c
StFRB508	+	63 b
508ΔPACI	+	25 c

^aThe Pseudomonas strain was added at 2×10⁷ CFU g⁻¹ soil to100-mL flasks (50 mL of soil per flask), after planting three 48-h-old, sterile-grown cucumber seedlings per flask. P. ultimum was added as a millet-seed inoculum at 2.5 g kg⁻¹ of vermiculite before planting. Plants were harvested after 7 d.

^bData represent the average of 10 replicates (flasks containing three cucumber plants) per treatment without P. ultimum and 16 replicates per treatment with P. ultimum. Means within the same column followed by different letters (a–c) are significantly different (P<0.05) according to Tukey’s HSD test.