I don't think it does anything really, no.
However we did get some tape which had a serrated edge and I expect if you fold out those serrations to act as a ring of spikes then it might work.
Can you train the guinea pigs to eat slugs?
My technique is to send slugs and snails on a flying lesson into the railway line behind the house.
I used the the stuff they sell for you to put out for the birds for nesting. I stuck it around my dahlias and they never touched them.
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I don't think it does anything really, no.
However we did get some tape which had a serrated edge and I expect if you fold out those serrations to act as a ring of spikes then it might work.
Can you train the guinea pigs to eat slugs?
My technique is to send slugs and snails on a flying lesson into the railway line behind the house.