Gas chromatogram of the sex pheromone components emitted by <i>H. axyridis</i> females.

<p>The chromatogram was obtained on the 12th day of sampling. The peaks that were associated with the pheromonal blend are numbered according to the components identified by GC-MS in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0115011#pone.0115011.s002" target="_blank">S1 Table</a>. These components were identified as β-elemene (1), methyl-eugenol (2), (–)-β-caryophyllene (3), α-humulene (4), and α-bulnesene (5). Peak 6 is (E)-β-farnesene, which was emitted by aphids, and peak 7 is an unknown compound of plant origin.