What beer are you using Fire? This was homebrew I am wondering whether it is the yeasty smell rather than the alcohol which they are attracted to? If that's the case you would need to use some bottle conditioned ale rather than cheap filtered supermarket lager.
I don't lavish real beer on slugs. Dissolve some sugar in warm water in a big screw top jar, add a pinch of baking yeast, put the lid on loosely so carbon dioxide can escape. Leave it at room temperature for three or four days and it's ready to use. Tastes awful to me, but the slugs go for it.
An amusing read is "The Little Book of Slugs" from the Centre for Alternative Technology. It describes numerous eco-friendly ways to reduce, kill, discourage and deter slugs. Many methods can be used in combination.
"Dissolve some sugar in warm water in a big screw top jar, add a pinch of
baking yeast, put the lid on loosely so carbon dioxide can escape.
Leave it at room temperature for three or four days and it's ready to
use. "
Isn't it the alcohol that is the point of a beer trap? Slugs can quite happily stay submerged in water for a long time.
I'm wondering if peanuts in beer would work even better. Mine go nuts for peanuts.
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An amusing read is "The Little Book of Slugs" from the Centre for Alternative Technology. It describes numerous eco-friendly ways to reduce, kill, discourage and deter slugs. Many methods can be used in combination.