馬光
witch-hazel cone gall aphid (Hormaphis hamamelidis), Lincoln, RI
Leaf is an Elm, probably Ulmus americana cultivar: https://www.inaturalist.org/observations/124465019
Ulmus glabra
Denison University Biological Reserve
Ulmus
Heavily affected elm. These are 2cm long.
Host is Ulmus pumila
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