Philippe Gautier wrote:
Funny, I tried the nematodes without any success in my garden and
concluded that it was too damp and cold!!!

Was it in spring? Because that's when you ought to do it. Twice at 3
weeks intervals. You will see the results the following years by seeing
less or none of the tiny little black slugs. I'm looking forward to
next spring to give my experiment a scoring point (cross fingers ;o)

Tu es francais?