Strawberries: Plants are wilting and collapsing in a young planting, roots are stubby and chewed…

…Fat, white insect larvae are found in the soil near the roots.

Larvae (grubs)

Larvae (grubs) of various insects such as Japanese Beetles and Rose Chafers live in the soil for much of the year and will feed on newly planted strawberry, blueberry and raspberry roots, especially plantings following sod or on lighter soils.

Various grubs that attack berry roots are pictured.

White grub with orange head and tan legs.

Pill-shaped white grub with orange head on blue background.

Adult insects feed on plants, but their larvae feeding on roots cause much more damage.

Rose chafer beetle. Tan shell with black line down center of back and white underbelly.
Rose Chafer (Macrodactylus subspinosus) adult

Both rose chafers and Japanese beetles are insects that belong to the May Beetle and June Bug family. More Japanese beetle information.

Japanese beetle with bronze shell and shiny green head. A black and white stripy underbelly is visible. Beetle is feeding on leaf making a lacy pattern of holes.
Japanese Beetle (Popillia japonica) adult