By Lizbone
Deux Sevres,
France 
Hi What can I use to save brassicas from cabbage white etc as we are not allowed to use derris powders etc here in France
4 Aug, 2013
Answers
Make a cage of netting to cover them
4 Aug, 2013
Enviromesh has worked brilliantly for me this year.
4 Aug, 2013
Have to be very fine mesh to stop whiteflies. The stuff we use keeps out the cabbage white butterflies, but not the tiny white flies.
5 Aug, 2013
Derris is banned almost everywhere in the World not just France.
This makes interesting reading
http://apps.rhs.org.uk/advicesearch/profile.aspx?PID=482#section3
4 Aug, 2013