Tomato Plants - leaf curl

I thought I would have a change and planted 1 x Alicante.  1 x Summerlast.   1 x Marmande.  Marmande seems to have leaf curl.   It had a bit of blackfly and week or so back, and I sprayed it a a fine w/up liquid with some vinegar in.   Could this be the case of the leaf curl.  Fortunately the others don't have it.   Mrs Bouquet

Yes, the green/blackfly puncture the soft new plant cells and this damage causes distortions in the new growth. Once washed off/killed by the soapy water spray, the growth will come in as normal. Squish the insects first to reduce the population. Little devils can be really thick on the growing tips.