I just have knowledge from other's experience in the form of scientific experiments. Yes, BG eat FHM and they are likely getting their fill of them. To reduce the FHM will require a predator that eliminates adult FHM preventing as much reproduction. The FHM can also become self limiting and insects (if enough of a population of predator insects establish) can also limit FHM below carrying capacity. I would think the situation of ideal for the predators stocked this fall.
I'd bet that the adult BG that the were stocked have grown substantially.
