Trifolium pratense, Polen, Bialowieza © Sébastien Carbonelle
Trifolium pratense, Flevoland, Reve-Abbertbos © Hans Jonkman
A galled flower remains closed and underdeveloped within the enlarged calyce, and contains one white, later pink larva, that pupates within the gall. Usually many flowers of a flower head ad attacked, giving the head an untidy appearance, and making it firm to the touch. Two or three annual generations; pupation in the soil.
Trifolium arvense, bordzilowskyi, hybridum, medium, pratense.
Not on T. repens.
Buhr (1965a), Dauphin & Aniotsbehere (1997a), Gagné (2010a), Mirumian (2011a), Redfern & Shirley (2011a), Roskam (2009a), Roskam & Carbonelle (2015a), Skuhravá & Skuhravý (2009a, 2010a, 2012a), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý & Hellrigl (2001a), Skuhravá, Skuhravý & Jørgensen (2006a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a), Sylvén (1983a).