A Buddleja (10 - 15 years), new climbing Clematis and a bush Rose (planted last year) got the same disease - something is eating the leaves ??? They are all planted along the same fence. Any suggestions ???
Not a disease, but a positional problem. I'd guess that the culprits are snails. If you go out at night with a torch you may find them at work. There may also be caterpillar present - check the backs of the leaves carefully.
Just spotted it - light green small caterpillar - how do I get them off ??? Spray ???
The easiest way is to pick them off by hand. You can spray with something like pyrethrum, but you have to actually hit the caterpillar, so you might as well just pick it off.