Assessment of allelopathic potential of the salicylic acid on target plants: Euphorbia heterophylla and Bidens pilosa

Salicylic acid has one of its characteristics the allelopathic potential. The present paper, is a research quantitative in nature aimed to assess potential salicylic identify best concentration range for other pure substances. bioassays were performed BOD incubator, seeking seedling growth by measuring radicle and hypocotyl length. Each bioassay occurred 12 days. concentrations used were: 1000, 750, 500, 250, 125, 62.5 ppm control. obtained data submitted tests: Kolmogorov-Smirnov normality, two-way ANOVA with repetition, Tukey. Based on results obtained, it was possible observe that several demonstrated significant differences, i.e., there an activity both species (Euphorbia heterophylla Bidens pilosa). highlights 750 1000 E. B. pilosa. However, no difference between these groups. radicle’s length part most negatively affected. These can be better substances, which are usually small quantities, being useful formulation product bio-herbicides.