Botanical Studies

Table 1 I₅₀ of aqueous methanol extracts of B. brizantha shoots harvested in June, October and January on root and shoot growth of cress, lettuce, P. pretense and L. multiflorum

From: The seasonal variations of allelopathic activity and allelopathic substances in Brachiaria brizantha

	I₅₀ (mg equivalent extract/mL)
	June	October	January
Cress
Root	4.5	6.3	19.8
Shoot	2.8	4.9	22.3
Lettuce
Root	2.5	4.5	55.7
Shoot	6.3	7.9	25.3
P. pratense
Root	1.8	2.5	23.7
Shoot	4.4	4.7	122.5
L. multiflorum
Root	4.9	7.2	123.5
Shoot	9.8	13.8	211.3

The values were determined by a logistic regression analysis after bioassays

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