Pemphigus Populitransversus on:
[Wikipedia]
[Google]
[Amazon]
''Pemphigus populitransversus'' also known as poplar petiole gall aphid or cabbage root aphid, induces galls on the leaves of
Alternate hosts are in the Brassica family. In these, galls form in the roots.
poplar trees
''Populus'' is a genus of 25–30 species of deciduous flowering plants in the family Salicaceae, native to most of the Northern Hemisphere. English names variously applied to different species include poplar (), aspen, and cottonwood.
The we ...
.
Description
Insect
Adults are 1.6-2.6 mm in length. They lack cornicles on the abdomen and have relatively short antennae and legs compared to other aphid species.Gall
Galls are induced by female ''Pemphigus populitransversus'' on the base of leaves in black cottonwood,narrowleaf cottonwood
''Populus angustifolia'', commonly known as the narrowleaf cottonwood, is a species of tree in the willow family (Salicaceae). It is native to western North America, where it is a characteristic species of the Rocky Mountains and the surrounding ...
, fremont cottonwood
''Populus fremontii'', commonly known as Frémont's cottonwood, is a cottonwood (and thus a poplar) native to riparian zones of the Southwestern United States and northern through central Mexico. It is one of three species in ''Populus'' sect. ...
, and aspen
Aspen is a common name for certain tree species; some, but not all, are classified by botanists in the section ''Populus'', of the ''Populus'' genus.
Species
These species are called aspens:
*'' Populus adenopoda'' – Chinese aspen (China ...
trees. The female ''P. populitransversus'' then lays her eggs inside of it. These galls are green or red, fleshy, smooth, and up to 14 mm in diameter. A slit allows the aphids to exit the gall.
Alternate hosts are in the Brassica family. In these, galls form in the roots.
References
{{Taxonbar, from=Q10622765 Hemiptera of North America Eriosomatinae Insects described in 1879