Allelopathic activity of aqueous extracts of arboreal species on the germination and initial growth of two weeds
DOI:
https://doi.org/10.18633/biotecnia.v26.1992Keywords:
Allelopathy, Convolvulus arvensis, Eucalyptus globulus, Portulaca oleracea, Schinus terebinthifolius.Abstract
In the search for sustainable management options for the weeds Convolvulus arvensis L. and Portulaca oleracea L., it was evaluated in vitro the inhibitory potential in germination and initial growth of the aqueous extract of the fruit, leaf and bark of the arboreal species, with allelopathic characteristics, Eucalyptus globulus Labill. and Schinus terebinthifolius Raddi. The germination and growth inhibition was evaluated by exposing weed seeds, arranged inside a Petri dish, to the spray of the extract at different concentrations. The fruit and leaf extracts of S. terebinthifolius, as well as that of the E. globulus leaf, inhibited the germination and growth of both weeds from the 2.5 % formulation. The biological activity of the extracts was positively related to the concentration. These results suggest that tree extracts represent a useful tool in the agroecological management of the two weeds.
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