[maelyn]

Does anyone know what bugs, insects or animal is eating my maigolds? Seedlings put out under polytunnel and 50% of the leaves have gone??
HELP Please

[DD.]

Slugs & snails love them!

[sunshineband]

I would also vote for slugs or snails -- put down some pellets and you will soon see

[love-my-plot]

Another vote for slugs n snails ... I do marigolds as sacrificial plants exactly for this
reason. If they're getting munched, it's gives the veg a chance to grow 

[spottymint]

Them slimey one's !

Will & can decimate them in just a few hours.