Allelopathy of 5 associated species on Mikania micrantha H. B. K.
Allelopathy of 5 associated species (Cyperus difformis, Polygonum hydropiper, Alternanthera philoxcroides, Bidens pilosa L. and Ipomoea batatas) on invasive plant Mikania micrantha H. B. K was studied. The bioactivity of aqueous extract from overground part of 5 associated species was evaluated on the growth of Mikania micrantha H. B. K. seedling. The results showed that aqueous extract from 5 associated species inhibited growth of Mikania micrantha H. B. K. seedling and the inhibiting order was Alternanthera philoxcroides > Cyperus difformis > Bidens pilosa L., the Polygonum hydropiper and Ipomoea batatas had similar the inhibition rate but were obviously weak to others. The weight were inhibited more than stem and root. These results showed associated species had allelopathic to Mikania micrantha H. B. K. seedling and effects of alien populations were more than that of local species.