Joe: Mainly there is cane and spur pruning. Most can be grown cane pruned. A few yield better spur pruned. And spur pruning is cheaper and easier for commercial growers. I've grown dozens of varieties of table grape all by cane pruning. Silent's vine right now is cane pruned. He has saved one cane of last years growth in each direction. Next year he could convert to spur by leaving what's there now and about 3-4 buds on each shoot that arises this year. If he wants to continue cane pruning he'd remove as much as possible of those two current canes and save two or more of this summers canes that arise near the base of current canes. Next time you might get more response if you start a thread of your own. This post was edited by fruitnut on Mon, Apr 1, 13 at 21:28

I can't seem to upload a second photo - so here's a more detailed description of the leaf damage. - Very small leaves, yellowish colour misshapen the edges are all feathered and tatty. I'd say that about 95% of the vine is affected.

I can't see your whole setup nor where you're located, but at that resolution I might see some sort of gall but since we don't know where you are can't work through it. As to the grapes themselves, could be a number of things including pruning, thinning, light availability, and so on but hard to determine with info provided, but if I were to WAG I'd say new vine and provide proper care to get it established to set good fruit... Dan

try some of these links: http://www.ento.csiro.au/anic/resources.html - the csiro entomology web page http://linus.socs.uts.edu.au/~don/larvae/butter.html - australian buttterfly larvae hope these help http://linus.socs.uts.edu.au/~don/larvae/papi/papilionidae.html - some more of the butterfly link