Plant Parasites of Europe

leafminers, galls and fungi

Procecidochares utilis

Procecidochares utilis Stone, 1947

crofton weed gall, cotton weed gall fly, eupatorium gall fly

on Ageratina

Procecidochares utilis: gall on Ageratina adenophora

Ageratina adenophora, New Zealand, Auckland, 8.iii.2018 © jacqui-nz


Conspicuous stem galls.

host plants

Asteraceae, monophagous

Ageratina adenophora.

distribution within Europe



Central American species, introduced in Madeira for the biological control of its host plant, that is a serious invasive pest there, like in many other subtropical regions.


Bess & FHaramoto (1972a), Haseler (1965a), Smit (2006a).

Last modified 15.x.2020