Do you remember that hemlock woolly adelgid has 2 generations each year? Our best predators so far all feed on the fall/winter generation. So, unless all the adelgid are eaten or die, come spring time a whole new generation emerges to feed and reproduce. We are hopeful that theses silver flies will put a real hurtin' on that spring generation so we can reduce adelgid levels and relieve the pest pressure on our hemlock trees year round.
A very special thank you to Mr. Darrel Ross at Oregon State University and Mr. Mark Whitmore at Cornell University who have tirelessly worked to collect flies in their native habitat, rear them in the lab, and ship them to us. As you can see, theses flies are small and fast. We could not do any of this work without such great cooperators!