Fig. 2
From: The seasonal variations of allelopathic activity and allelopathic substances in Brachiaria brizantha
Effects of aqueous methanol extracts of B. brizantha shoots harvested in June (filled circle), October (unfilled circle) and January (filled diamond) on root and shoot growth of cress, lettuce, P. pretense and L. multiflorum. Concentrations of tested samples corresponded to the extracts obtained from 0.3, 1, 3, 10, 30, 100 and 300 mg dry weight of B. brizantha per mL. Mean ± SE from five independent experiments with ten plants for each determination are shown