I don't know whether it is the result but since I planted my blackberry bushes along the chicken coop, there are less of them. The girls like to hide under them in the shade and pick off the beetles as they come to the blackberries. Of course the chickens get any blackberry below the knees but that still leaves plenty for me and it also reduces the number of beetles eating my other crops. Win win. Does the milky spore work well? I bought some but haven't put it out yet.