Biology of depression. Scientific studies have found that numerous brain areas show altered activity in patients suffering from depression, and this has encouraged advocates of various theories that seek to identify a biochemical origin of the disease, as opposed to theories that emphasize psychological or situational causes.
1 They eat the roots and stems of small and young plants which can cause disease and kill the plants. 2  An often over looked problem that grubs cause is they attract other pests. 3  Many animals eat grubs and that can damage your lawn as well.
15. Moles actually can be beneficial in the garden when they are present in small numbers. Moles kill grubs that kill grass and young shrubs. For the mole, a white grub is usually just an appetizer to the main course of earthworms, but one study found that about 2/3 of moles eat at least some white grubs. In the course of its lifetime, a mole may consume as many as 200 grubs.