Chrysomela vigintipunctata (Scopoli 1763)

Family: Chrysomelidae

The beetles are shiny, round, slightly elongated, 6.5 to 8.5 mm in size. The elytra are in shades from pastel light ochre yellow to orange-reddish. There are 10 elongated dark spots on each elytra. There is a distinct black border on the elytra seam.

The larvae are up to 10 mm in size, grayish-white with many regularly symmetrically placed black spots and warts.

In May, the beetles lay eggs on the underside of leaves. After completing reproduction, they die. The hatched caterpillars cause damage mainly to willows (but they also attack poplars, birches, alders and other trees), especially when they overgrow. The adult larvae pupate on the underside of leaves, where they stick their bottoms. Adults hatch 35 days after egg laying. They are winged and can spread to other areas. The adult beetles overwinter.

Imaga are found in moist meadows where host plants grow, especially in the lowlands.