Table 2.

Comparison of the zone of inhibition produced by PGPRs strains against E. coli in well diffusion and disk diffusion method. All such means which share a common English letter are similar, otherwise, they differ significantly p ≤ 0.05.

Treatments	Well diffusion method				Disk diffusion method
	Zone of inhibition (mm)				Zone of inhibition (mm)
	12 h	24 h	36 h		12 h	24 h	36 h
Bacillus pumilus (HYJW)	4.5 ± 0.01f	5 ± 0.02e	6.5 ± 0.02c		5 ± 0.02de	5.5 ± 0.01d	7 ± 0.01c
Bacillus cereus (HY9K)	3 ± 0.01 g	3.5 ± 0.01 g	4.5 ± 0.01f		3.5 ± 0.01 g	4 ± 0.01ef	5 ± 0.01
Pseudomonas sp. (HY8N)	6 ± 0.02 cd	7 ± 0.02b	8 ± 0.03a		7 ± 0.01c	8 ± 0.02b	8.5 ± 0.02a
Pseudomonas sp. (HY13KI)	3.5 ± 0.014 g	4 ± 0.01f	4.5 ± 0.02f		3.5 ± 0.01 g	4 ± 0.01ef	4.5 ± 0.01e
Pseudomonas sp. (HY13KR)	2 ± 0.01 h	2.5 ± 0.01 h	3 ± 0.01 g		3 ± 0.01 h	3.5 ± 0.01	4 ± 0.01e

Different letters signifies significant variations at LSD (P = 0.05), n = 3 and ± indicates standard error between three replicates