That to the spanner family of butterflies counting insect (also diamond-bark tensioner, Latin Peribatodes rhomboidaria) is common 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 trunk and in the foliage. From March to April, the turning rounds are gray-brown tracked (also crepe worm) the eyes (Buds). These are hollowed out like holes so that no shoots can arise (see in the picture). If the shoots larger, the caterpillar can no longer cause damage. The winegrowers then say "that the rhombic vine shoot grows out of its mouth" . Due to their branch-like camouflage, they are hardly recognizable. The hump-like appearance is typical because the hind legs are pulled towards the front legs when eating.
The caterpillars are until after expulsion active in May and occasionally until June and then pupate. The hatched moths fly from late June to early July and lay eggs in clutches of up to ten Leaf undersides, on the petioles and on the shoots. The young caterpillars appear in August and go into hibernation in September. Combat is only occasionally necessary, as it is mostly eliminated by natural enemies. Only be with frequent occurrence insecticides or the soil bacteria Bacillus thuringiensis used. See a list of all pests below Vine enemies,
Images: © Weingut Steffens-Keß