Gnat-looking bugs on tomato plants? not aphids???

I have a bunch of tomato plants, some of which seem more resistant than others (by variety) to having these tiny bugs that look like gnats that don't buzz around all over the tops--not the undersides--of the leaves. Are these aphids? None of the pictures of aphids I've seen seem to match what this insect is. Any ideas about what these could be and how to get rid of them before they lay eggs or destroy my crop?





Thanks for your advice!

Gnat-looking bugs on tomato plants? not aphids???
I don't have an answer but the same problem. I agree they are not thrips. They are very tiny and if I remember correctly (it is dark outside now or I would go check) it seemed that their wings rested perpendicular to their back versus flat against it if that helps. They are not fruit flies either so far as I can tell. They don't fly around much but rather just cling to my tomato stems (in vast quantities) plus they are more wing than body if that makes sense.
Reply:They're probably fruit flies, tomatoes are fruit. I used to have fruit flies buzz around my tomatoes all the time, I would probably get rid of the gnats by spraying the plants with pesticides, when your ready to eat your tomatoes be sure to wash them so the pesticides will wash away.
Reply:Spray with Sevin suspended in water.
Reply:They are Thrips. Ask at the greenhouse how to get rid of them.