ALELOPATIA DE Arctium minus BERNH (ASTERACEAE) NA GERMINAÇÃO E CRESCIMENTO RADICULAR DE SORGO E PEPINO

Valdenir José Belinelo; Márcio Paulo Czepak; Sidney Augusto Vieira Filho; Luis Fernando Tavares de Menezes; Claúdia Masrouah Jamal

ALELOPATIA DE Arctium minus BERNH (ASTERACEAE) NA GERMINAÇÃO E CRESCIMENTO RADICULAR DE SORGO E PEPINO

2008

Valdenir José Belinelo | Márcio Paulo Czepak | Sidney Augusto Vieira Filho | Luis Fernando Tavares de Menezes | Claúdia Masrouah Jamal

The objectives of this work were identified and characterize the allelopatic activity of extracts obtained from Arctium minus (Hill) Bernh (Asteraceae). The fitotoxic activity of organic extracts (1 e 100 mg.L-1) and aqueous extract (5,00 e 0,05% m/v) on the germination and radicular growth of the monocotyledon Sorghum bicolor L. (sorghum), and the dicotyledon Cucumis sativus L. (cucumber) were evaluated. The results showed the presence of allelopatic activity variable in according to the extract concentration and with the target plant. The intensity of induced inhibitory effect was higher for the ethanolic extract in concentration of 100 mg.L-1 for Sorghum bicolor L. The results also indicates the existence of the potential use of Arctium minus (Hill) Bernh ethanolic extract as a natural herbicide and open perspectives for the research of the constituent(s) with higher allelopatic activity.

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