I have what I think are flea beetles on my carrots, they are very small brown insects dotted around the leaves.What is the best way to get rid of them without using chemicals or is it best to leave them?
I'd leave them. Normally healthy plants grow "through" an attack of flea beetle. I wouldn't use any chemicals which will get rid of them. One of the chemicals, a type of derris, is banned from October 2009 on. That reminds me to go through the site and remove any references to it!