The insect galls on the leaves of Zelkova serrata were formed by the aphid Colopha moriokaensis. The crude extracts of the gall-forming aphid showed hypertrophy-inducing activity against the cultured cells of Z. serrata. Bioassay-guided fractionation of the extracts led to isolation of three triacylglycerides containing (E,E, E)-octa-2,4,6-trienoic acid.

Abstract Laboratory feeding and fecundity bioassays, field defoliation surveys were conducted on 73 Ulmus eight Zelkova taxa to determine their relative susceptibility, preference, suitability for the adult Japanese beetle (Popillia japonica Newman). alata Michx., U. crassifolia Nutt., davidiana Planch., elliptica K. Koch, , glabra Hudson, laevis Pall., microcarpa, L.K. Fu, multinervis (syn. ca...

The East-Asian aphid Tinocallis (Tinocallis) zelkowae is recorded for the first time in Iberian Peninsula on Zelkova serrata (Ulmaceae) Viveros Gardens of city Valencia (Spain). This second record species Europe, after being cited a Japanese zelkova bonsai England 1974. Alate viviparous females and sexuales (winged males apterous oviparae) are here described, we present molecular sequence mitoc...

The simulation of tree species migration suffers from many sources of uncertainty. In our study we examined the influence of species parameter uncertainty on simulated tree species migration, using the spatially linked dynamic forest landscape model TreeMig. The impact of uncertainty becomes especially apparent under critical conditions arising from the interaction of species sensitivities to c...

Debris flows can transport large amounts of material and therefore present a significant threat to infrastructure human life. In this research, we used tree-ring width analyses quantify the response trees three debris flow events in NW Slovenia (Javoršček, Srpenica) W (Nikova) for which know time origin. We attempted date these similar tree responses past compared patterns between different spe...

In this paper, a new method for estimation of vertical leaf area density (LAD) profile of tree canopy using portable scanning lidar is proposed. In this method, which we refer to as the voxel-based canopy profiling (VCP) method, several measurement points surrounding the canopy and optimally inclined laser beams are adopted to facilitate full laser beam illumination of whole canopy up to the in...