I have a mystery insect larva that has appeared in one of my planted tanks that would be fascinating were it not so destructive. It behaves very similar to some moth larva, wherein it chews off a leaf and wraps it around itself as a protective covering, then hauls the leaf-home around with it. The problem is these guys are eating my plants at an alarming rate...they seem to prefer Ludwigia's but will take new growth on the Persicaria and other large-leaved species. Fine-leafed stems such as Rotala wallichii and Myrio's are utterly ignored, as are Crypts, but they're going for my Bucephalandra's. So they've gotta go.
I'm thinking a massive dose of Panacur might solve the problem, and there are no fish in this tank, only plants and various snails. Anyone have any suggestions other than this? Will Panacur upset the plants?
No idea how these guys entered the tank, but I suspect a fly flew inside and laid eggs in the tank. I suppose they could've hitched a ride on a plant, but I haven't added anything new for a while.
Here are some low-quality pics of this pest. Max size of the 15 or so I've pulled out of the tank this morning is about half an inch.