Figure 1.

Effects of a mixture of VOCs, prepared by mimicking the volatile profile of Cytisus scoparius flowering foliage or only flowers, assayed at 12.5 and 25 ppm in Petri dishes, on the total percentage of germinated seeds (Gt) and early growth of two agricultural weed species (Amaranthus retroflexus and Digitaria sanguinalis). Mean values of four replicates are represented in percentage relative to control. Error bars represent standard deviation (S.D.). For each target weed species, p- and F-values of the effects of treatments from one-way ANOVA or Kruskal-Wallis H tests are shown. Mean values labeled with distinct letters denote statistically significant differences among treatments (post hoc LSD or Tamhane’s T2 test).