Holcus lanatus, Belgium, prov, Hainaut, Froidchapelle © Sébastien Carbonnelle: very inconspicuous gall

more conspicuous gall

gall after removal of the leaf sheath

enlargement

on Holcus

gall

Close to a node the culm has, concealed by the leaf sheath, one or more oval shallow depressions. They are weakly rimmed, and are not covered by the epidermis. In each lies a white, 3 mm long, larva or its puparium. The infested parts turn purple.

larva

The larva is described by Ertel (1975a).

prosternum with spatula (from Möhn, 1955a)

host plants

Poaceae, monophagous

Holcus lanatus, mollis.

references

Buhr (1964b), Carbonnelle, George, Giot & Romain (2018a), Dauphin & Aniotsbehere (1997a), Ertel (1975a), Gagné (2010a), Horeman (1990a), Kieffer (1901a), Möhn (1955a), Redfern & Shirley (2011a), Roskam (2009a), Roskam & Carbonnelle (2015a), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý & Meyer (2014a).