Table 1.

Antibacterial activities against Xanthomonas oryzae pv. oryzaeof the title compounds.

Compds.	Toxic Regression Equation	R	EC50 (μg/mL)
2-(Methylsulfonyl)-5-phenyl-1,3,4-oxadiazole	y = 2.16x + 2.18	0.98	20.07 ± 1.21
2-(Ethylsulfonyl)-5-phenyl-1,3,4-oxadiazole	y = 1.52x + 2.77	0.98	29.00 ± 1.25
2-(Methylsulfonyl)-5-(4-fluorophenyl)-1,3,4-oxadiazole	y = 4.13x + 0.89	0.95	9.89 ± 1.52
2-(Ethylsulfonyl)-5-(4-fluorophenyl)-1,3,4-oxadiazole	y = 3.28x + 1.61	0.96	10.80 ± 1.43
2-(Methylsulfonyl)-5-(4-chlorophenyl)-1,3,4-oxadiazole	y = 1.72x + 2.64	0.99	23.21 ± 0.98
2-(Ethylsulfonyl)-5-(4-chlorophenyl)-1,3,4-oxadiazole	y = 1.60x + 2.25	0.99	52.61 ± 1.08
2-(Methylsulfonyl)-5-(2,4-dichlorophenyl)-1,3,4-oxadiazole	y = 1.04x + 3.21	0.99	52.14 ± 1.05
2-(Ethylsulfonyl)-5-(2,4-dichlorophenyl)-1,3,4-oxadiazole	y = 1.43x + 2.42	0.97	63.95 ± 1.05
Bismerthiazole	y = 1.50x + 2.05	0.98	92.61 ± 2.15
Thiodiazole copper	y = 1.54x + 1.79	0.98	121.82 ± 3.59