Q.Aphids on Tomatoes
How can I control aphids on tomatoes?

Certified GKH Gardening Expert
I would recommend spraying with neem oil. It is safe for humans, animals and beneficial insects but is very effective on pest insects like aphids. Here is more information:
https://www.gardeningknowhow.com/plant-problems/pests/homemade-aphid-control-a-natural-way-to-kill-aphids.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

Have you used baby powder in the soil and/or sprinkled onto the leaves?