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.
The grubs of all species feed on the roots of many plants, but prefer the fibrous roots of turfgrasses. As the root system is destroyed, sections of turf wilt, turn brown and can be easily pulled back to reveal grubs beneath (Figure 6). Secondary damage is also caused by skunks searching for grubs as food.