Contarinia jacobaeae (Loew, 1850)
on Senecio s.l.
Jacobaea vulgaris, Zwolle-zuid, 8.ix.2021 © Arnold Grosscurt (the orange larvae ware able to jun; whether the white larvae belong to the same species is unclear)
Jacobaea vulgaris, België, prov Luik, Amay © Jean-Yves Baugnée
Jacobaea vulgaris, Belgium, prov Namur, Viroinval © Stéphane Claerebout
larva
gall
The flower heads are swollen and somewhat fleshy. Also the stems may be galled: usually in their upper part, with conspicuous, unilateral swellings and distortions. The larvae are gregarious, shining yellow (Rübsaamen) or yellowish white (Skuhravá ao), and able to jump. Generally several generations per year; pupation in the ground.
hostplants
Asteraceae, narrowly oligophagous
Jacobaea aquatica, erratica, erucifolia, paludosa, vulgaris; Senecio leucanthemifolius subsp. vernalis, sylvaticus, viscosus, vulgaris.
larva
spatula (from Rübsaamen, 1891a).
synonyms
Stictodiplosis jacobaeae; Diplosis senecionis Rübsaamen, 1891.
inquilines
predatoren
Lestodiplosis giardi, jacobeae.
notes
It is not fully certain that the larva pictured above is not the inquiline; however, that species is not known from the Benelux.
references
Baylac (1988a), Béguinot (2006c), Buhr (1965a), Burton, Carbonnelle, Ellis & Schneider (2019a), Coulianos & Karlsson (2014a), Dauphin & Aniotsbehere (1997a), Docters van Leeuwen (1936a), Grosscurt (2022b), Houard (1909a), Kieffer (1891a), Lehmann & Hannover (2016a), Máca (2012a), Redfern & Shirley (2011a), Roskam (2009a), Roskam & Carbonnelle (2015a), Rübsaamen (1891b), Schneider (2016a), Simova-Tošić, Skuhravá & Skuhravý (1996a, 2000a), Skuhravá & Skuhravý (1994a, 1997a, 1999a, 2011a, 2021a: 262), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý, Dončev & Dimitrova (1991a, 1992a), Skuhravá, Skuhravý & Jørgensen (2006a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý & Neacsu (1972a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a), Spungis (2003a), Tomasi (2014a).