
Appearance
The wingspan is 13–17 mm. Adults are on wing in May and June and again in August in two generations in western Europe.Food
The larvae feed on ''Eupatorium cannabinum'', ''Pluchea indica'', ''Solidago virgaurea'' and ''Brassica'' species. There are two broods, one which bores in stems and produces galls, the other feeding in flowers, although flower feeding has not been recently confirmed.References:
Some text fragments are auto parsed from Wikipedia.