Survival rate of larvae reared on <i>Betula pendula</i> leaves with different concentrations of surface lipophilic compounds.

<p>Bars are mean ±SE. The data were pair-wise compared using a post-hoc Fisher LSD procedure. The letters above the bar mean the significant differences (at <i>P</i><0.05) to be compared with the bars abbreviated by the same letters within the bar.