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gall wasps

Around 1,400 species, large family of skin wings. Most of them are predatory parasitoids (live from host animals) and are with it beneficials in viticulture, the rest of vegetable tissue and thus Vine enemies, The mostly 1 to 3 and in some species up to 8 millimeters large, winged insects have no wasp waist and are black, brown or yellow in color. The eponymous eggs and the hatched hatched larvae give them their names Gallen depending on the type of insect formed on leaves, buds, stems, flowers and roots. The individual species specialize in certain host plants. The leaves are most often affected by oak trees, because there are a thousand different oak gall wasps alone (picture on the right). At the Rebstock they occur only to a relatively small extent. See also under wasps,

Gallwesoen - Andricus coriarius and Cynips Quercus quercusfolii (oak gall wasp)

Left: By Fritz Geller-Grimm - Own work, CC BY-SA 3.0 , Link
Right: CC BY-SA 2.5 , link

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