Achillea ptarmica, Belgium, prov. Namur, Villers-sur-Lesse; © Jean-Yves Baugnée

gall

The gall contains a number of chambers, each with a single whitish larva; two to three generations per year; pupation within the gall.

host plants

Asteraceae,monofaag

Achillea millefolium, ochroleuca, ptarmica, salicifolia.

parasitoids, predators

Pnigalio soemius.

references

Béguinot (2007b), Bellmann (2012a), Buhr (1964b), Burton, Ellis & Schneider (2022a), Dauphin & Aniotsbehere (1997a), Gagné (2010a), Houard (1909a), Ilie & Marinescu (2011a), Kieffer (1901b), Koops (2013a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon, Schneider & Feitz (2001b), Lehmann & Hannover (2016a), Redfern & Shirley (2011a), Roskam (2009a, 2019a), Roskam & Carbonnelle (2015a), Skuhravá & Skuhravý (1997a, 1999a, 2012a, 2021a: 27), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý & Jørgensen (2006a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý & Neacsu (1972a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a).