Philippe Gautier wrote:
Tu es francais?
Belge!

Heh! Pas de mal, mes chiennes sont Belges aussi ;o)

Don't remember when I used it (long time ago), but I think the
conditions were within the acceptable, temperature-wise. My mistake,
probably, was spraying only the borders and not the other parts of the
garden which looked like "slugs and snails" refuges. But then, I
realized that if I wanted to spray my entire garden, it would cost me a
real fortune! Yes, BTW, the main culprits in my garden are snails rather
than slugs, and it's not quite clear to me if the nematodes work against
snails as well?

Snails too. Ideally one ought to use it just before planting or sowing.
They stay active for 6 weeks under the soil. I didn't spray but watered
- I made if I remember well, 6 litres out of one carton of nematodes
(and lots of sawdust it seemed) and reaplied 3 weeks later. It's the
lil' babies I am after (sounds terrible) - the big slugs I can manage
because I can see them!! Also, I'm sure you know but just in case, if
you are that bothered with snails, try companion planting with Garlic,
Lavender, Wormwood, Thymes, Sage, Stinging nettles, Borage, older
marrows, squash or cucumber, Geraniums, Mint, Lemon balm, Tansy and
Hyssop plus copper rings on the most suseptible plants, I manage a
decent garden.

Repeat hunting really works too and help after a hard days at work )