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.
More facts. Grubs in lawns do damage by cutting off grass plant roots. The grass plant responds by growing new roots, but in the meantime, the plant is more susceptible to moisture stress if it lacks rain. So, technically, grubs do not damage or kill a lawn; a lack of water does.n order to know what to do about grubs, you have to learn about them. In the Northeast, most grubs are Japanese beetles, although a few are masked chafers. Both beetles look similar and have a similar life cycle.