CITATIONS 0 READS 401 3 authors: Some of the authors of this publication are also working on these related projects: Effect of PGPG on alleviating salinity stress in maize View project Characterization of Streptomyces spp. isolates from Fabaceae rhizosphere as Plant Growth Promoting Rhizobacteria in soybean [Glycine max (L.) Merrill] View project ABSTRACTWe evaluated the effects of aqueous and ethanolic extracts from 3-Baccharis species (B. dentata, B. uncinella and B. anomala) on the germination and seedlings growth of Lactuca sativa (model species) and Bidens pilosa (weed), and by chemical analysis, the phenolic compounds were determined in extracts. Aqueous and ethanolic extracts of B. dentata, B. uncinella and B. anomala were tested at 2.5, 5, 7.5 and 10% concentrations. Allelopathic effects of three Baccharis species were variable. The B. pilosa was more sensitive to the extracts than L. sativa and germination was inhibited with ethanolic extracts of B. anomala and B. uncinella from 5 to 10%. Aqueous extract of B. dentata and B. uncinella at 10% concentration reduced the germination of B. pilosa by 80%. The ethanolic extracts of B. uncinella (2.5 to 10%) and B. anomala (5 to 10%) caused 100% mortality of seedlings. Total phenolic compounds were more abundant in aqueous extracts. Amongst the phenolics, catechin was most abundant (1.61 to 6.16 mg g -1 DM) in aqueous and ethanolic extracts of Baccharis species tested. This study showed that Baccharis uncinella may be used as an alternative bioherbicide to control the weeds in agroecosystems.