First insects of the season.

So this year I thought I would get ahead of the season and plant some cole crops. I planted some Brussels sprouts and kohlrabi as well as sugar snap peas, lettuce, and kale seeds. The peas are coming up great and I don't seem to be having the cutworm problems that I had last year, so far. My lettuce is beginning to come up. And I also put in some zucchini which is coming up nicely. BUT, my Brussels sprouts and kohlrabi are plagued with flea beetles and have taken a beating. Not sure where they came from. All of the information I have been able to find suggests that they overwinter in the soil, but I have never seen them in my garden bed before. I did use some straw from old  bales that I grew green peppers in to mulch the plants and wondered if that could be the cause, but I have used that same straw in other places and have not seen beetles there. When I bought the flat of seedlings I  felt that I had too many plants so I gave three of them to a fellow gardener whose bed is at the opposite end of the community garden, and his plants look great. Go figure. I have already purchased another six pack of seedlings to replace the ones that I don't think I will be able to save and will plant them in my garden bed away from the ones I now have and see what happens. 

In the meantime - here is some information that I have found about Flea Beetles: http://www.planetnatural.com/pest-problem-solver/garden-pests/flea-beetle-control/