Adult Japanese beetles are one quarter to one half inch long with copper coloured wing covers and a shiny metallic green head. Between the green head and tiny tufts of white hair along their side you’ll recognize them easily as they happily munch on your roses.
While they generally donít eat dogwood, forsythia, holly, lilac, evergreens and Hosta, they’ll eat darn near everything else. These beetles feed on flowers and fruits making a skeleton of the leaves by eating the green parts and leaving the veins. Adults are most active from 9 a.m. ñ 3 p.m. on warm summer days. These voracious pests prefer plants in direct sun, so shady areas are usually less damaged.