Tiny Snails!
I had an infestation in an orchidarium a couple of years ago. I
submerged all the mounts in water. Snails and slugs came out to the
surface after two or three hours. I repeated after a couple weeks for
two or three times. Killed around 60 of them, ten the second and two or
three the last. For me was very effective, although laborious.
Regards
Jorge
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