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Keywords from Image Description:
Knopper gall on oak Quercus robur induced by Andricus quercuscalicis gall wasp Arnhem the Netherlands. en Knopper gall on oak Quercus robur induced by Andricus quercuscalicis gall wasp Arnhem the Netherlands nl Knoppergal op Zomereik Quercus robur veroorzaakt door de agame generatie van de galwesp Andricus quercuscalicis Arnhem