Common cockchafer
melolontha ) does most of its damage in the larval stage, when it feeds on roots of grasses and clover. The adults [...] large head, with strong mandibles and long, hairy, well developed yellow legs. It takes three or four years for the larvae to fully develop. The grubs are 10 to 20 mm in the first autumn, 30 to 35 mm by the following autumn, and 40 to 46 mm in