Monochroa hornigi (Staudinger, 1883)
on Persicaria, Polygonum
Persicaria lapathifolia, Belgium, prov.East Flanders, Lebbeke, 19.ix.2018 © Ruben Meert: habitat
the plant does not show any sign of infection
larva in the tunnel.
Persicaria lapathifolia, Belgium, prov. East Flanders, Dendermonde, Baasrode, Vlassenbroekse Polder en Schorren, 12.ix.2018 © Ruben Meert: habitat
transverse section through a parasitised stem
The larva bores in the stem; exteriorly nothing betrays its presence. In the experience of Ruben Meert the species lives, always solitarily, in the neighbourhood of a node.
Polygonaceae, narrowly oligophagous
The larva lives in the autumn; around November it leaves the tunnel, next lies curled in a semitransparent hibernaculum, covered with reddish brown material, spun at the outside of the stem.
distribution within Europe
See Bland ao.
Barton (2015a), Bland, Corley, Emmet ao 2002a, Leutsch (2011a),