TABLE 2.

Protection of Swiss wheat cultivars against the root pathogen Pythium ultimum by P. fluorescens^a

Cultivar	Strain(s) used for treatment	Fresh wt (%)b
		Root	Plant
Arina	Pythium	11.5 cd	27.9 d
	Pythium + CHA0	60.7 a	82.9 a
	Pythium + KD	15.9 c	46.6 c
Zinal	Pythium	9.6 cd	33.8 d
	Pythium + CHA0	40.9 b	65.7 b
	Pythium + KD	16.9 c	51.3 c
Cimetta	Pythium	6.9 d	28.7 d
	Pythium + CHA0	47.0 b	67.2 b
	Pythium + KD	16.3 c	50.4 c

^aPlants grown under gnotobiotic conditions were inoculated with bacteria and on the same day infested with Pythium ultimum. After 3 weeks of growth in artificial soil under sterile conditions, plants were harvested and assessed for fresh weights.

^bPlant fresh weights are expressed as percentages of weights of corresponding untreated control plants (total plant weights: Arina, 3.04 g; Zinal, 2.94 g; Cimetta, 2.75 g; root weights: Arina, 1.44 g; Zinal, 1.46 g; Cimetta, 1.42 g). Values are the means of two experiments with four replicates each. Values within the same column followed by the same letter are not significantly different according to Fisher's protected LSD (P ≤ 0.05).