Answer: White grubs ? the larval stage of beetles ? eat roots. In the vegetable and flower garden, they are not usually a major pest because flower roots are too far apart and annual flower beds are repeatedly dug up.
If you decide to treat, you can use Milky Spore an organic, naturally occurring host-specific bacterium (Bacillus popillae-Dutky). This product is lethal to and specifically targets white grubs. Best wishes with your garden!
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