Sue,
Nice sleuthing. I was headed out for a bike ride so I just Googled the product name. Most of the sites were Italian. On the one I could read, I was a little puzzled when I saw no mention of a fungicide, because the chemical name resembled one, and if they're adding it, why wouldn't they brag about it, you know?
Sabrina,
Sometimes I find groups of slugs congregating under bricks or pots. I've noticed that when night-hunting snails, they tend to run in pairs—and if I find one, there's always another close at hand. As a side note, they're hermaphroditic, so they're less concerned with finding "the right one" as they are with finding "anyone". I would assume slugs operate the same way.
As a survival mechanism, every snail doesn't emerge every night to forage, and not all at the same time, meaning that you have to hunt them consistently, at staggered times, until their numbers are depleted.
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••••• [Yuck-alert] Graphic details of •••
•••••• slug/snail massacre follow. •••••
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They follow slime trails, so a good way to find more is to leave a "terminated" one where it lies, and the next night you'll find others scavenging the carcass. I had so many slugs at one time that I used dry pine needles to skewer them, because their slime is hard to wash off, and has been known to carry parasites.
