White grubs, a general name. Ascerno. Figure 1. Grub. Identification: White grubs is a general name for the grub (larval) stage of beetles in the family Scarabaeidae, order Coleoptera (beetles) that feed on the roots of turf (Figure 1) .amage, scouting, and management: Larvae feed on the roots of turf grasses and adults feed on roses, phlox, and petunias, although they are active at night and more cryptic compared to Japanese beetle. A good pheromone trap is available.
Parent material is the underlying geological material (generally bedrock or a superficial or drift deposit) in which soil horizons form.cean deposited parent materials, called marine sediments, are collections of material that have been carried by rivers and streams to the ocean and eventually sink to the bottom.
Abiogenic: Coal (black only) is a material that may contain presence of organic compounds, but that was filled by inorganic hydrocarbons that migrated by continuous upwelling come from great depth and reached these deposits in the surface and preserving fine debris and cellular tissues of plants.ccording to the Abiogenic (Abiotic) Theory, hydrocarbons are very abundant on the planet but the search for discovery of commercial accumulations is not simple because it must pass through understanding of geology of the favorable areas and especially understand the real nature of oil and natural gas.