Gymnancyla canella (Denis & Schiffermüller, 1775)

hoary knot-horn

on Salsola

Gymnancyla canella on Salsola kali

Salsola kali, Belgium, prov. West Flanders, Knokke, 23.viii.2018 © Ruben Meert: habitat

Gymnancyla canella on Salsola kali

larva in the stem

Gymnancyla canella on Salsola kali

another image

Gymnancyla canella on Salsola kali

the frass is ejected from the gallery and is trapped in spinning

Gymnancyla canella on Salsola kali

here also spinning is visible

Gymnancyla canella on Salsola kali

Salsola kali, Belgium, prov. West Flanders, Zeebrugge, strand Westdam, 23.x.2018 © Ruben Meert. In the spinning also many sand grains are caught.

parasite

The larva essentially lives as a stem borer, but according to the literature older larvae often also live free among a spinning, feeding on the developing seeds. Pupation in an oval cocoon, made up of sand and silk, in the soil,

host plants

Amaranthaceae, monofaag

Salsola kali.

The often repeated statement that the species rarely occurs also on Atriplex is probably incorrect.

phenology

Univoltine; larvae from August till October.

distribution within Europe

(PESI, 2018).

references

Beirne (1954a), Huertas Dionisio (2007a).

mod 27.ix.2018