The essential oil, isolated by hydrodistillation from fresh flowers of Spartium junceum L., was investigated by GC and GC/MS. The 24 main constituents of the samples were identified; the main components of the oil were kairomonal compounds, tricosane (22.9%), tetracosane (8.9%) and pentacosane (16.1%), constituting altogether almost 48% of total composition. These hydrocarbons constitute an important aspect governing the sensitivity of the insects in plant host selection.
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