I have missed seeing Bipetual here.
I wanted to reply earlier, but was also keying on the leaf roll part. Don't quote me on this because it is just my opinion - Ants for tomato plants/tomatoes are just irritating for us . They might actually be beneficial because they aerate the soil sort of like worms do. But that is just my thoughts.
Leaf roll on other hand is a problem.
One Site:
https://www.gardeningknowhow.com/edi...es-curling.htm
Another Site:
http://www.clemson.edu/extension/hgi...leaf_roll.html