If ANYONE at all could help, I'd be eternally grateful!! I've done so much research "trying" to figure out this problem, still no luck. On my hollies, type mentioned in message posting, all was well until last year. THen they started getting almost horizonal lines in leaves, usually about midleaf. The upper part would be brown, black, or yellow with black spots. I drastically pruned, gave the insides air, etc. etc. Removed and disposed of all "effected" foliage. All seemed okay...
This year, same thing, Though some leaves completely brown, some with horizontal line with black above line. Some with what was described as before. WHAT IS THIS????
Sorry I can't figure out photos. They are well spaced (air circulation), in part shade, acidic loamy soil. It's not the "holly leaf miner", according to photos I've seen of that. Does anyone know??
I hate to lose them but... last year I went as far as potting each up, then against all my best intentions used Malathion or something (which I HATE)...
What is this?