Adult: 32-40 mm, elongated, convex, fawn to dark brown elytra, bearing white irregular spots. Antenna well-developed, lamellated, particularly in the male. Larva: 60-80 mm long, similar to that of the common cockchafer ( Melolantha melolantha) , body whitish, curved into an arc; extremity of the the abdomen blackish. Head large, bearing strong mandibles; thoracic legs yellow, elongated, slender and hairy. Fine bristles, quite short on the pygidium with 2 parallel series of 7-8 short spines in the anal region.
Biology and Damage
Adult flies 1 hour after sunset and remains motionless during the day. It mates on the branches. The female deposit her eggs in the sandy soil neighbouring the trees. Average fecundity: 30 eggs. Eggs development lasts 1 month. Larva develops in the ground and gnaws roots. It overwinters in the ground.It pupate in the ground in a small cell. Pupation lasts 1 month. The larva overwinters 3 times in the ground then pupates in May of third year; the adult appears from mid-June to mid-July, feeds then lays eggs. The adults are harmless to the crop; the larva attack the roots of hazelnut.
DE: Müller, Walker, ES: Gusano blanco de los pinos, FR: Hanneton des pins, Hanneton foulon, IT: Maggiolino marmoreggiato, GB: Pine chafer, TR: Haziran böceði