Bod Petryal in the drizzle

Plenty of Mompha raschkiella mines on the Rosebay Willowherb along the circular path around Bod petryal. Apparently this is the only leafminer found on Rosebay, while there are a range of  other Mompha species on the true Willowherbs, Epilobium. 

The larvae can be found from the end of May to the end of July and from the end of August to the end of September.

The tunnels loop around cutting off tissues (until tissues turn reddish) a large yellowish patch mine is formed.