Rate of soil egestion by larvae of Hylamorpha elegans (Burm.) and Phytoloema hermanni Germ. (Coleoptera: Scarabaeidae)

Abstract

-Larvae of Hylamorpha elegans (Burm.) and Phytoloema herrmanni Germ. feed on roots, although many Scarabaeidae species are able to feed and survive on soil without living roots. In this study we evaluated the potential of H. elegans and P. herrmanni to ingest soil by estimating the rate of soil egestion. In the laboratory, the rate of soil egestion was determined from gut content and gut transit time of 3 rd -instar larvae feeding on soil without roots. The soil egestion rate was 14-21 mg g

Soil Environments Influence Gut Prokaryotic Communities in the Larvae of the Invasive Japanese Beetle Popillia japonica Newman

“…Larvae were incubated at room temperature (21°C) for 7 days. Since transit time for substrate through the digestive tract of JB larvae has not been reported, we guided the incubation time based on the report for other soil-dwelling root-feeding Scarabaeidae species, which was from 2 days (Millas and Carrillo, 2010 ) up to ~5 days (4–8 h in the midgut and up to 4 days in the hindgut) (Egert et al, 2005 ). Again, soil and larvae were handled as described for the natural infestations.…”

“…Soil-dwelling scarab larvae continuously ingest a mixture of inorganic and organic soil components (Crowson, 1981b ; McQuillan and Webb, 1994 ; Millas and Carrillo, 2010 ), including microorganisms adhered to plant material and soil particles (Gan and Wickings, 2020 ). Through this constant processing of soil and its highly diverse microbial constituency (Fierer, 2017 ; Jansson and Hofmockel, 2018 ), scarab larvae will acquire a mixture of symbiotic and transient (i.e., those passing through the alimentary canal either unchanged or removed through attrition) gut microbiota.…”

A Population Outbreak ofLichnia gallardoiGutiérrez, 1943 (Coleoptera: Scarabaeidae) in the Matorral Shrublands of the Transitional Coastal Desert of Chile

“…In Chile, studies of scarab beetles are limited and based mainly on taxonomic studies Smith et al 2008;Mondaca and Ocampo 2012;Ocampo and Mondaca 2012) and forage species of interest (Artigas 1994;Cisternas and Carrillo 2010;Millas and Carrillo 2010). However, some scarabs have received recent attention for their potential role as an indicators of ecosystem changes (Nichols et al 2007;Blaum et al 2009;Davis et al 2013).…”