To the big group of weevil counting insects (Byctiscus betulae) of different varieties. Other names are leaf roller, leaf winder, turner, vine leaf winder, vine engraver, vine picker, funnel winder, cones winder and cigar winder. The flyable beetles are five to seven millimeters in size and have a metallic green, copper red or steel blue, glossy color. They attack shortly after expulsion the leaves and leave short, typical feeding strips. The females gnaw the stalk of the leaves so that they die and hang down. Then they roll the leaves into a wrap and lay their eggs (mostly six eggs in a "cigar").
The rolled leaves then fall off and the hatched larvae eat the decayed residues. After pupation, the new beetle generation hatches in September. Some types also attack the grapes. As a secondary effect is thereby also an intrusion of mushrooms favors and among others the gray mold caused. The pests are using insecticides fought. See also below Vine enemies,
Pictures above: André Mégroz
Graph below: PP Kohlhaas - AGES Vienna