Food Plant: Brassica species, various Resedacea and occasionally Cannabis sativa

Egg: laid in stems at the bases of petioles in batches of three to four eggs. The stems enlarge and discolour around these oviposition sites.

Mine: April-July

Notes: The larvae mine the stems, sometimes to the roots, causing damage, which in severe cases can cause wilting and death of the affected areas. The larvae may mine the leaves and many mines may be found in large leaves. When fully developed the larvae exits the stems or via the enlarged oviposition sites and pupate in the soil. This species is common throughot England and Wales and can cause considerable economic damage to crops by destroying seedlings or greatly reducing the growth and yield of plants affected.

Data:

Image:©

References:
Hering, M (1957) - Bestimmungstabellen der Blattminen von Europa.
Robbins, J (1990) - A Provisional Atlas of The Leaf Miners of Warwickshire.