Sportnem_leaflet_EN_A4_-_Koppert_20230441_-_DEF_LR.pdf
adults do
not cause any damage but the larvae live in the soil and feed
on roots and shoots of mainly grasses and cereal crops, which
they pull into the ground [...] in early summer when they mate and lay eggs. The
emerging larvae feed on roots of grasses, cereals and many
other crops. It takes three to four years for [...] on humus
particles. In the second larval stage they start to feed on the
roots of grasses. The older larvae overwinter and start feeding
again in spring