Fine diatomaceous earth will make them unhappy wherever they contact it. Don't dust so heavy that the plants can't photosynthesize.

Dan

Hi, I had the same problem and used Rotenone Dust by Bionade. It's supposed to be an organic pesticide, but I would not recommended. Although it did got rid of the beetles, it also kill all my earthworms on that side of my raised bed. Now it looks like a sad war field, all the poor earthworms just lying there dead. Just wanted to pass on the information.

Maria

Here is a link that might be useful: The Lagunites Gardening Experience

Thanks for the suggestions and advise. I went and got some DE and put it on the other day. I looked the plants over yesterday and only saw 1 lonely flea beetle where before there were at least dozens per plant. I think I put it on a little heavy, but luckily it got windy later that day and blew the excess off.