Haplodiplosis marginata (von Roser, 1840)

saddle gall midge, black cereal midge

on grasses

gall

The culm, usually aboven the uppermost node, with one or more narrow saddle-shaped depressions. In each one blood red larva. Hibernation, and then pupation, in the ground.

host plants

Poaceae, oligophagous

Alopecurus myosuroides; Arrhenatherum elatius; Avena sativa; Dactylis glomerata; Elytrygia intermedia subsp. trichophora, repens; Holcus mollis; Hordeum vulgare; Lolium temulentum; Phleum pratense; Poa pratensis; Schedonorus pratensis; Secale cereale; Triticum aestivum.

larva

spatula with papillae (from Möhn, 1955a)

synonyms

Clinodiplosis, Diplosis, Haplodiplosis, equestris Wagner, 1871.

notes

A pest in cereal crops.

Generally, the larvae pupate in the soil unprotected. However, in some regions of western Europe the larvae do spin a cocoon, presumably as a protection against unfavourable weather conditions, especially drought (Censier ao, 2014a).

references

Buhr (1964b, 1965a), Censier, Chavalle, Knor, De Proft, Bodson & Skuhravá (2014a), Dauphin & Aniotsbehere (1997a), Gagné (2010a), Houard (1908a), Möhn (1955a), Redfern & Shirley (2011a), Roskam (2009a, 2019a), Roskam & Carbonnelle (2015a), Rübsaamen (1895a), Simova-Tošić, Skuhravá & Skuhravý (2000a, 2004a), Skuhravá & Skuhravý (1994a, 1999a, 2021a: 28), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý, Dončev & Dimitrova (1991a, 1992a), Skuhravá, Skuhravý & Jørgensen (2006a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a).