The spanner family of the butterflies counting insect (also diamond bark tensioner, Latin Peribatodes rhomboidaria) is widespread in central and southern Europe. It comes on Rebstock, but also on numerous other plants. The hibernation takes place as a young caterpillar in the bark on the stem and in the foliage. In March to April, the turn-round, drab brown infested tracked (also Kreppelwurm) the eyes (Buds). These are hollowed hole-like, so that no shoot can arise (see picture). If the shoots grow larger, the caterpillar can no longer cause feeding damage. The winemakers then say, "that the shoot grows out of the mouth of the Rhombenspanner" . Due to their branch-like camouflage they are hardly recognizable. Typical is the cat-hawk-like appearance, because when eating the hind legs are pulled to the front legs.
The caterpillars are up to the expulsion active in May and occasionally until June and then pupate. The hatched butterflies fly in late June to early July and lay the eggs in up to ten pieces Leaf undersides, to the petioles and to the shoots. In August, the young caterpillars appear, which go into hibernation from September. Combat is only occasionally necessary as it is mostly eliminated by natural enemies. Only with frequent occurrence become insecticides or the soil bacterium Bacillus thuringiensis used. See a list of all pests below Vine enemies,
Pictures: © Weingut Steffens-Keß