Flea beetles are about the size of a flea, and have long back legs and jump (just like a flea). I hate fleas. And I suspect that I'm going to learn to hate flea beetles, too.
So I went online quickly this morning before going to work. Yes, flea beetles are fairly common and attack tomatoes, potatoes, and some of the cruciferous plants. I'll let you know if they get into my leafy veggies - apparently they like them, too. Sticky traps might help, so might Rotenone powder - which I am going to try as well.
I also decided to try a water trap with insecticidal soap. Since Daniel had a small yellow plastic cup from Easter, I buried it in the ground and filled it with the soapy liquid hoping the yellow would attract the beetles. So far it seems to be working and has attracted a few bugs. Sorry to the flies and the ants.
The "shotholes" that flea beetles leave.
The cup - there is a flea beetle in the upper left of the oval.
Yellow sticky trap
I also have found that there are leaf miners in my spinach and my Swiss chard. Yes, it is one thing after another with a garden, and you do have to keep an eye on it. The leaf miners really aren't that big a concern - I just cut them out when I use the leafy greens, but they would be a huge problem commercially. We get them in the peas, too, but they only go into the leaves and the pods, not the peas themselves, so they REALLY aren't a problem there.
Leaf miners in spinach
Leaf miner eggs - that little white speck in the middle is a set of 4 leaf miner eggs.
I can't emphasize enough that the Internet is a fantastic resource for learning about gardening. It is where I have learned the most.