Impact of chemical manipulation of tarsal liquids on attachment in the Colorado potato beetle, Leptinotarsa decemlineata.

Journal of Insect Physiology
Stefanie F GeiselhardtKlaus Peschke

Abstract

Insect tarsal attachment forces are thought to be influenced by the viscosity and surface tension of a thin film of adhesive liquid (wet adhesion). In beetles, this fluid has been shown to be composed mainly of lipophilic substances that are similar to the cuticular lipids. In this study we investigate whether and how the chemical composition of footprint lipids affects attachment forces in the Colorado potato beetle, Leptinotarsa decemlineata. After application of standardised mixtures of synthetic n-alkanes or alkenes, or a concentrated hydrocarbon extract to the surface of the elytra, we tested the beetles' attachment performance using a beam force transducer. The results show that only the unsaturated components, but not the straight-chained alkanes reduced friction forces, confirming that attachment performance is influenced by the chemical composition of the adhesive secretion. We estimated the volume of footprint droplets and calculated a mean thickness of the liquid layer of 0.04 microm. The measured friction exceeded the viscous and capillary force expected for a film of this thickness. Therefore, alternative mechanisms (i.e. shear-thinning and solid-like behaviour) for the generation of attachment forces and their dep...Continue Reading

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Citations

Apr 3, 2010·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Stefanie F GeiselhardtKlaus Peschke
Aug 22, 2014·Journal of the Royal Society, Interface·Henrik PeiskerStanislav N Gorb
Dec 7, 2014·Analytica Chimica Acta·Manuela ReitzMichael Lämmerhofer
Nov 18, 2017·The Journal of Experimental Biology·Alyssa Y StarkStephen P Yanoviak
Dec 24, 2014·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·David Labonte, Walter Federle
Nov 9, 2016·Beilstein Journal of Nanotechnology·Lars HeepeStanislav N Gorb
Nov 9, 2016·Beilstein Journal of Nanotechnology·Matt W EnglandElena V Gorb
May 7, 2020·Journal of the Royal Society, Interface·Antonio IazzolinoTristan Gilet
Jan 21, 2016·Proceedings of the National Academy of Sciences of the United States of America·David LabonteWalter Federle
Aug 28, 2014·Beilstein Journal of Nanotechnology·Jan-Henning Dirks
Mar 24, 2012·The Journal of Experimental Biology·Henrik Peisker, Stanislav N Gorb
Oct 18, 2014·The Journal of Experimental Biology·Constanze GrohmannStanislav N Gorb
Jul 10, 2021·Biointerphases·James Elliott FowlerJoe E Baio

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