Hi there, new to forums,
I found a great site about getting rid of roaches. I live in the deep South, and everyone has them here. I had about 30 in my shed one day and was positively disgusted, being from VA originally I was not used to this
... but I found a solution and the answer is bay leaves. I can't believe how well they work. Crush them up, sprinkle them in your yard, and the roaches will go somewhere else. I have not to this day seen another roach since using bay leaves, it took 2 days and they were all gone. All gone! Anyway this site here has a lot of interesting ways to deal with them, and it does list bay leaves. (I got the bay leaf idea from another lady in a NY apt. who swore she had them everywhere, put down bay leaves and hasn't seen one in 20 years)
http://www.unce.unr.edu/publications/files/nr/2000/SP0007.pdf
Good luck!