By Redwine
West Midlands,
United Kingdom 
What caterpillars are these that are eating my stocks plus how do you kill them?
8 Aug, 2015
Answers
They are cabbage white butterfly caterpillars. If you must kill them then pick them off on pop them on a bird table. there are sprays you can get to kill them but they kill lots of other beneficial insects too.
8 Aug, 2015
Previous question
They are cabbage white caterpillars. You can treat them with pyrethrum or pick them off and feed to the birds.
8 Aug, 2015