Table 5.

Phytotoxic activity of G. wallichianum rhizome crude extract and fractions.

Sample	Concentration (μg/mL)	Number of fronds survived		% Growth regulation	Standard paraquat
		Sample	Control
Crude extract	10	0	25	100	100
	100	0	23	100	100
	1000	0	26	100	100
Chloroform fraction	10	20	25	20	100
	100	18	23	21.73	100
	1000	15	25	40	100
Ethyl acetate fraction	10	20	25	20	100
	100	20	23	13.04	100
	1000	19	26	26.92	100
n-butanol fraction	10	20	25	20	100
	100	19	23	17.39	100
	1000	19	26	26.92	100
Aqueous fraction	10	19	25	24	100
	100	19	23	17.39	100
	1000	18	25	28	100

Inhibition of 30–40%: nonsignificant activity; 50%: moderate activity; 60–70%: good activity; 70%: significant activity.