Table 2.

Urease inhibitory potentials of Polygonum hydropiper extracts and saponins, and essential oil.

Samples	Concentration (μg/ml)	Percent inhibition	IC50(μg/ml)
Ph.Cr	1,000	35.66 ± 0.44***	1,380
	500	24.50 ± 0.28***
	250	18.00 ± 0.57***
	125	11.66 ± 0.66***
	62.5	9.53 ± 2.25***
	31.25	5.00 ± 0.57***
Ph.Hex	1,000	40.00 ± 0.57***	1,400
	500	33.83 ± 0.44***
	250	27.50 ± 0.50***
	125	21.33 ± 0.57***
	62.5	18.66 ± 0.00***
	31.25	13.50 ± 0.00***
Ph.Chf	1,000	62.16 ± 0.44***	520
	500	51.16 ± 0.60***
	250	43.50 ± 0.28***
	125	37.00 ± 0.57***
	62.5	31.00 ± 1.15***
	31.25	26.66 ± 0.66***
Ph.EtAc	1,000	52.16 ± 0.44***	880
	500	40.83 ± 0.44***
	250	35.00 ± 0.50***
	125	28.00 ± 0.00***
	62.5	21.00 ± 1.90***
	31.25	15.86 ± 1.10***
Ph.Bt	1,000	25.33 ± 0.33***	2,390
	500	21.00 ± 0.00***
	250	17.00 ± 0.28***
	125	11.00 ± 0.00***
	62.5	8.50 ± 1.00***
	31.25	5.33 ± 0.33***
Ph.Aq	1,000	38.16 ± 0.72***	>3,000
	500	25.00 ± 0.50***
	250	11.83 ± 0.44***
	125	8.00 ± 1.00***
	62.5	5.00 ± 1.15***
	31.25	2.00 ± 0.00***
Ph.Sp	1,000	75.83 ± 0.44***	98
	500	70.00 ± 0.57***
	250	67.00 ± 0.50*
	125	56.66 ± 0.0***
	62.5	44.33 ± 3.8***
	31.25	38.66 ± 2.2***
Ph.Lo	1,000	79.33 ± 0.66ns	90
	500	70.50 ± 0.57***
	250	62.00 ± 0.00***
	125	55.83 ± 0.44***
	62.5	48.00 ± 1.00***
	31.25	39.00 ± 1.15***
Thiourea	1,000	96.29 ± 0.50	80
	500	87.40 ± 1.50
	250	70.45 ± 0.00
	125	66.66 ± 1.9
	62.5	55.53 ± 0.0
	31.25	44.33 ± 3.8

Result expressed as % inhibition (mean ± SEM of n = 3) and IC₅₀ values. Values significantly different as compare to positive control,

^*P < 0.05,

^***P < 0.001.