Aceria dispar

Aceria neoessigi

Aceria parapopuli

Contarinia p-tremuloides-stem-gall

A green, hairless gall found on the stem in Spring. Integral to host.

Diplodia tumefaciens

Ectoedemia populella

Euhexomyza schineri

Harmandiola helena

Harmandiola p-tremuloides-bead-gall

A globular, green, hairless gall found on the upper leaf/leaf midrib/on leaf veins in Summer. Integral to host.

Harmandiola p-tremuloides-bumpy-bead-gall

A globular, red/green, hairy/hairless gall found on the upper leaf/lower leaf/leaf midrib/... in Summer. Integral to host.

Harmandiola p-tremuloides-like-globuli

Harmandiola p-tremuloides-like-populnea

Harmandiola p-tremuloides-like-tremulae

Harmandiola p-tremuloides-lips-gall

Harmandiola p-tremuloides-pouch-gall

Pachypappa pseudobyrsa

Pachypappa rosettei

Pachypappa sacculi

Pemphigus populicaulis

Pemphigus rileyi

Phyllocolpa robusta

A green, hairless structure found on the leaf edge in Spring. Integral to host.

Phyllocoptes didelphis

Prodiplosis morrisi

Saperda inornata

Taphrina johansonii

Unknown-aphididae p-tremuloides-cherry-gall

Unknown-cecid p-tremuloides-club-gall

Unknown-cecid p-tremuloides-petiole-gall

A green, hairless/ruptured/split gall found on the petiole in Summer. Integral to host.