Abstract
AbstractSpondyliaspiscf.plicatuloidesandGlycaspis brimblecombei(Hemiptera: Aphalaridae) are invasive insect pests ofEucalyptus, native to Australia. The insects feed on eucalypt sap, and both psyllid species exhibit clear preferences for different species and hybrids ofEucalyptus. The objective of this study was to identify the constitutive morphological and phytochemical characteristics underlying these host preferences. Four preferred and eight non-preferred eucalypt hosts were selected for evaluation. Thirteen leaf morphological features of the 12 eucalypts were analysed. The non-polar and polar metabolites in and on the surface of leaves of each eucalypt species were extracted, and their chemical composition was analysed using gas chromatography coupled with mass spectrometry. The leaf volatile profiles of hosts and non-hosts ofS. cf.plicatuloidesandG. brimblecombeidid not differ sufficiently to explain the host choices of the two eucalypt psyllids. The leaf polar metabolite profiles of the susceptible hosts of the two psyllids differed significantly but did not explain the host preferences of the two psyllid species. However, preferred hosts ofS. cf.plicatuloidesandG. brimblecombeihad some leaf morphological features and wax metabolites in common. Our results show that particular combinations of leaf morphological features and wax metabolites might influence the host choice of eucalypt-feeding lerp psyllids, but no traits explaining the differences in host-selection behaviour betweenS. cf.plicatuloidesandG. brimblecombeiwere identified.
Publisher
Springer Science and Business Media LLC
Subject
Biochemistry,Ecology, Evolution, Behavior and Systematics
Reference71 articles.
1. Aksenov AA, Martini X, Zhao W, Stelinski LL, Davis CE (2014) Synthetic blends of volatile, phytopathogen-induced odorants can be used to manipulate vector behavior. Front Ecol Evol 2:78. https://doi.org/10.3389/fevo.2014.00078
2. Beadle CL, Turnbull CRA (1992) Comparative growth rates of Eucalyptus in native forest and in plantation monoculture. In: Calder IR, Hall RC, Adlard PG (eds) Growth and water use of forest plantations. Wiley, Chichester, pp 318–331
3. Bella S, Rapisarda C (2013) First record from Greece of the invasive red gum lerp psyllid Glycaspis brimblecombei Moore (Hemiptera: Psyllidae) and its associated parasitoid Psyllaephagus bliteus Riek (Hymenoptera: Encyrtidae). Redia 96:33–35
4. Brennan EB, Weinbaum SA (2001a) Effect of epicuticular wax on adhesion of psyllids to glaucous juvenile and glossy adult leaves of Eucalyptus globulus labillardière. Aust J Entomol 40:270–277. https://doi.org/10.1046/j.1440-6055.2001.00229.x
5. Brennan EB, Weinbaum SA (2001b) Stylet penetration and survival of three psyllid species on adult leaves and “waxy” and “de-waxed” juvenile leaves of Eucalyptus globulus. Entomol Exp Appl 100:355–363. https://doi.org/10.1046/j.1570-7458.2001.00883.x