The caterpillar feeds on host plants of many different families.
Common host plants used are those of the families Magnoliaceae and Rosaceae, with species including tulip tree (Liriodendron tulipifera), sweet bay magnolia (Magnolia virginiana) and wild black cherry (Prunus serotina).
It also feeds on other members of the family Rosaceae, as well as members from the families Lauraceae, Oleaceae, Rutaceae, and Tilioideae.

Aspens (Populus sect.
Populus), birches (Betula), and willows (Salix) have been recorded in older literature as host plants, but these are used by P. canadensis.
Host plants of P. glaucus include:
Wild black cherry (Prunus serotina)
Ash (Fraxinus species)
Cottonwood (Populus species)
Wafer ash or hoptree (Ptelea trifoliata)
Common lilac (Syringa vulgaris)
Sweet bay magnolia (Magnolia virginiana)
Tulip poplar or tulip tree (Liriodendron tulipifera)
Willow (Salix species)
The caterpillar feeds on host plants of many different families. Common host plants used are those of the families Magnoliaceae and Rosaceae, with species including tulip tree (Liriodendron tulipifera), sweet bay magnolia (Magnolia virginiana) and wild black cherry (Prunus serotina). It also feeds on other members of the family Rosaceae, as well as members from the families Lauraceae, Oleaceae, Rutaceae, and Tilioideae.
Aspens (Populus sect. Populus), birches (Betula), and willows (Salix) have been recorded in older literature as host plants, but these are used by P. canadensis. Host plants of P. glaucus include:
Wild black cherry (Prunus serotina)
Ash (Fraxinus species)
Cottonwood (Populus species)
Wafer ash or hoptree (Ptelea trifoliata)
Common lilac (Syringa vulgaris)
Sweet bay magnolia (Magnolia virginiana)
Tulip poplar or tulip tree (Liriodendron tulipifera)
Willow (Salix species)
Papilio glaucus