Most growers know that codling moths in the lower Midwest do not behave the same as codling moths in more northern apple growing areas. We usually do not have distinct generations. Here is a graph showing my weekly pheromone trap catches at the Meigs Farm near Lafayette. Notice that the counts have never gone down to zero, meaning that eggs are likely always being deposited. If your pheromone trap catches look like this, you should never relax your control efforts toward codling moth. There really is never any time when we are between generations.