Alkanes used for host recognition by the arctiid moth, Diacrisiacasignetum Kollar

the odorous alkane compounds mixture from 12.5 to 100 μg/ml concentrations of mature leaves was most attractive to D. casignetum, whereas mixtures of alkane compounds from young and senescent leaves indicated positive response of the test insects from 25 to 100 μg/ml concentrations. But the odorous alkane mixture from senescent leaves demonstrated a decreasing positive response at 100 μg/ml concentration. D. casignetum moths were attracted by synthetic octadecane at 50 and 100 μg/ml concentrations, tricosane at 50 μg/ml concentration, tetracosane from 12.5 to 50 μg/ml concentrations, octacosane from 12.5 to 100 μg/ml concentrations, and dotriacontane from 25 to 100 μg/ml concentrations, whereas eicosane and heneicosane did not result either clearly positive or negative responses by this insect.