Turfgrass and Insects
The Japanese beetle (Popillia japonica) is about 1/2 inch long with a shiny metallic-green body and bronze-colored outer wings. The beetle has a row of five lateral tufts on each side and one each on the last segment of the abdomen.
These beetles are not yet considered a threat in Missouri; however, some Japanese beetles have been found. Grubs feed on roots of turfgrasses and cause a wilting appearance and gradual thinning. Dead turf sod can be rolled back under heavy infestations. Adult beetles can be damaging to leaves of both turf and ornamentals. White grubs should be treated in the first or second instar during July and August.
IPM1020, new June 2003