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.
Grub worms are Japanese Beetle larvae, or the babies of those beetles. Unlike earthworms that fertilize your soil to make your plants and flowers healthy, grub worms ruin them by munching on the roots of your plants, flowers, and grass in your lawn or garden.f you have grub worm issues in the lawn, then you most likely will have them in the vegetable garden as well. Here are some of the common signs of grub worm infestation of plants or lawn: 1  Droopy leaves. 2  Green-gray or brown patches on your lawn. 3  Grass easily âpeelsâ off. 4  Ground feels spongy to the feet.