Posted: 21/07/2014 at 20:15
I have keel slugs and the best solution I've found is to grow slug resistant varieties. This year I tried watering-in nemaslug and grew a non-resistant variety of 1st early which I know are susceptible (Orla) and they had a fair bit of damage, so using nematodes may not help, or more applications than I used may be necessary. Reliably resistant varieties here are Kestrel (2nd early) and Sarpo Mira (late maincrop.) Fair resistance from King Edward and Golden Wonder.
BTW, I have clay soil which keel slugs seem to love.