A preferred host of gypsy moth, death occurs when nearly complete defoliation by gypsy moths is followed by a fungal infection by Armillaria spp.
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The most serious disease is hypoxylon canker (caused by Entoleuca mammata).
Populus | Populus tremuloides | Populus tremula | Populus alba | Populus nigra | Populus fremontii | Populus sect. Aigeiros | ''populus Romanus'' (Roman people) | ''Populus nigra'', originating in the United States from plantings by André Michaux | Populus lasiocarpa | Populus deltoides |