gall elm grass aphid sack tetraneura ulmi leaf ulmus glabra wych |
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navigate by keyword : aphid aphidoidea broken byrsocrypta colony damage damaged deformed disease elm foliage gall garden glabra grass green insect leaf parasite pest plant sack scotch symptom tetraneura tree ulmi ulmus wych |
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Gall of Elm-grass aphid or Elm sack gall aphid Tetraneura ulmi on green leaf of Ulmus glabra or Wych elm |
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