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Insects Feeding
on this Plant:

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Alnus glutinosa
(Black Alder) [Betulaceae]
(Observations are from Clark et al., Needham et al., ScaleNet)

Coleoptera (Beetles)

Chrysomelidae: Calligrapha confluens Clk2004

Diptera (Flies)
Tenthredinidae: Fenusa dohrnii (European Alder Leafminer) Ndm1928

Homoptera (Sucking Insects)
Diaspididae: Chionaspis lintneri (Lintner Scurfy Scale) [this insect is found in E USA & SE Canada] SN2014,
Chionaspis salicis (Willow Scurfy Scale) [found mainly on twigs & branches; this insect is polyphagous, although it prefers Salix spp. & Populus spp.; this insect is widely distributed in the USA] SN2014, Diaspidiotus ostreaeformis (False San Jose Scale) [found on bark, polyphagous; this insect is widely distributed in N USA & S Canada, also in Eurasia, where it is native] SN2014, Lepidosaphes ulmi (Oystershell Scale) [found on bark, polyphagous; this insect is widely distributed in the USA, S Canada, & Eurasia] SN2014

Lepidoptera (Butterflies, Skippers, & Moths)
Gracillariidae: Caloptilia glutinella [leaf-roller or leaf-miner] Ndm1928
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