What pernicious plague kills my concords and murders my muscadines?

Zone 7b (Huntsville). Heavy clay soil.

Look upon these leaves and weep.


Any advice would be super helpful.

I think probably aphids, but I can’t tell for sure. I do see insect frass.

Would they impact the veining in such spectacular fashion, though?

Can’t tell for sure on my phone. I will get on my laptop later. Can you get a picture of the bottom of the leaves?

Will do. It's dark now but will get a pic of the underside tomorrow.

Outside of some chemical or developmental issue that may be affecting them with the early spring growth (apologies....here south of the Canadian border it's still spring!)...it might be a virus disease or disease complex.  But given the similarity to the photos shown here >>  https://www2.ljworld.com/news/2010/jul/18/grapes-tomatoes-sensitive-injury-drift-remains-iss/    .....maybe think if some herbicide spraying has been done in the area recently.  Good luck!

I don’t know if they’ve gotten to your area, but I’m hearing that here in Pennsylvania, the invasive spotted lander fly is wreaking havoc with grapes. Not sure what the damage looks like, though.

My husband is a biodynamic ag consultant.  Says it looks like root damage from nematodes (due to insufficient beneficial microbes and minerals in the soil.)  Also looks like aphids on the stems, attacking the plant because it is weak, and a calcium/phosphate spray will get rid of that.  It makes the plant stronger too, as it will absorb through the foliage and any washing off goes into the ground and benefits the roots as well.  To make it, mix a high calcium lime with rock phosphate or just get the cal/Phos already mixed.  Add 2 tbsp. To a 5 gallon bucket, stir, let it settle out, stir again, let settle out and use the clear water on top in a sprayer.  For smaller plants just use a spray bottle.  Keep it on hand, works on pests quickly.  Also helps ailing plants.  Works even better if you can get Humate to mix a little in, tbsp or so.  It is sold under name of Foundation.  If you can’t get humate, a good, well made compost with substitute as it has active microbes in it.  

Thanks, folks! Faye: I'll look into your advice and give you an update!

As promised earlier, here are the underside pics.