small destructive galls on grape leaf caused by an aphid-like insect

agriculture animal animals aphid aphids arthropod arthropoda ball caused closeup cutlivated dactylosphaera damage detail disease europe fauna focus format fretter fretters gall galls grape growth illness infestatiuon insect insecta invertebrata invertebrate leaf like nature parasite phylloxera problem selective vermins vine viteus vitifoliae vitifolii