? on Persicaria bistorta

Diptera, Cecidomyiidae

? on Persicaria

Cecidomyiid on Persicaria bistorta

Persicaria bistorta, Belgium, Prov. Liège, Butgenbach, RN de la Vallée de la Schwalm © Stéphane Claerebout

Cecidomyiid on Persicaria bistorta

same leaf, underside

Cecidomyiid on Persicaria bistorta

gall

Cecidomyiid on Persicaria bistorta

underide of a leaf, with three occupied galls close together

Cecidomyiid larva on Persicaria bistorta

a singe larva, in drop of digestive liquid

Cecidomyiid larvae on Persicaria bistorta

sometimes two larvae share a gall

Cecidomyiid larva on Persicaria bistorta

larva

gall

one or more inconspicuous bumps on the upperside of the leaves; in the corresponding depression at the underside one (rarely two or three) white cecidomyiid larvae.

hostplants

Polygonaceae, narrowly monophagous

Polygonum bistorta.

Accordig to Buhr rarely also on Persicaria amphibia.

notes

It is not known wich species in involved, despite the fact that Buhr, under # 4980, cites several papers referring to this gall.

references

Buhr (1965a).

19/06/2016

pub 19.vi.2016 · mod 23.vii.2017