How big do grub worms get?
Also question is, what do large grub worms turn into?
They feed on grass roots (and organic matter in the soil), causing sections of grass in the lawn to die. Grubs eventually turn into adult Beetles and emerge from soil to mate and lay eggs, which hatch into more Grubs. Most Scarab Beetles have a one-year life cycle; June Beetles have a three-year cycle.
Likewise, people ask, are grub worms bad?
The answer to whether grub worms will hurt your garden is a resounding yes. These annoying pests feed on the roots of plants and turfgrass, which can cause severe and irreversible damage to the vegetation. Once you have taken the proper actions to get rid of the grubs, implement preventive measures to keep them at bay.
White grubs are the slug-like larval stage of many insects. They root around just below the surface, eating the roots of grass and other plants as they grow. The most commonly encountered white grubs are the larvae of June bugs, European Chafers, Masked Chafers, Billbugs, Oriental Beetles and Japanese Beetles.