Sportnem_leaflet_EN_A4_-_Koppert_20230441_-_DEF_LR.pdf
which is present
in parts of Europe and the USA, has two generations per year,
one in autumn, with overwintering larvae and one in summer.
Sportnem-T [...] chafer (Phyllopertha horticola) is present
in Europe and parts of Asia. The males can be seen in early
summer in swarming flights just above the soil surface [...] start to cause
damage in autumn. The larvae overwinter and become active
again and feed voraciously when the soil begins to warm up in
spring. The common