Persicaria amphibia, Belgium, prov. Namur, Gembloux: heavy infestation © Jean-Yves Baugnée

light infestation

Persicaria amphibia, Amstelveen, Schinkelbos: transverse section

larva; at right a cocoon

Persicaria maculosa, Zalk © Arnold Grosscurt

pupae in cocoons

gall

A gall contains several white-orange larvae that pupate there in a white cocoon. Several generations per year.

host plants

Polygonaceae, oligophagous

Bistorta officinalis, vvipara; Persicaria amphibia, hydropiper, lapathifolia, maculosa.

According to Buhr rarely also on Fallopia dumetorum and even Polygonum aviculare.

larva

prosternum with spatula (from Möhn, 1955a)

Persicaria spec., Belgium, prov. Namur, Couvin, Aublain, 31.v.2022 © Sébastien Carbonelle: the lesser larva is a predatory gall midge, possibly a Macrolabis.

synonyms

Perrisia persicariae.

references

Béguinot (2001c, 2002h, 2012a), Bellmann (2012a), Bruun (2015a), Buhr (1965a), Chinery (2011a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Deckert & Deckert (2016a), Gagné (2010a), Groom (2011a), Houard (1908a), Koops (2013a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon, Schneider & Feitz (2001b), Lehmann & Flügel (2012a), Lehmann & Hannover (2016a), Mirumian (2011a), O’Connor (2005a), O’Connor & Wistow (1999a), Redfern & Shirley (2011a), Roskam (2009a), Roskam & Carbonnelle (2015a), Schneider (2016a), Simova-Tošić, Skuhravá & Skuhravý (1996a, 2000a, 2007a), Skuhravá & Skuhravý (1994a, 1999a, 2021a: 193), Skuhravá, Skuhravý, Blasco-Zumeta & Pujade-Villar (2006a), Skuhravá, Skuhravý & Buhr (2013a), Skuhravá, Skuhravý & Carbonnelle (2017a), 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), Sylvén (1983a), Tomasi (2012a, 2014a).