Cardamine hirsuta
Kathleen Sayce (Tue, 02 Apr 2013 18:19:56 PDT)

This little pest is also in my garden, and I have shifted to the use of boiling water or steam (as with a steam-producing floor mop) to control cardamine seedlings. This is especially effective on my gravel paths. Vinegar sprays also work, but in my damp climate, steam seems the best as I don't have to wait for a dry day.

Kathleen