White grubs (larvae) of various insects such as Japanese beetle or Rose Chafer live in the soil for much of the year and will feed on newly planted strawberry, blueberry and raspberry roots, especially following sod or on lighter soils causing gradual decline in plant vigor.
Japanese beetle grub found attacking berry roots. Adult Japanese Beetles also feed on raspberry leaves.
More Japanese beetle/white grub information.
Adult Rose chafers feed on plants, but their larvae feeding on roots causes much more damage. More Japanese beetle/white grub information.
