I received a note from the author of the study, Luisa Livingstone, who provided more information and corrections- not the least of which is that she has not yet been awarded a PhD. This reflects her additional information.
Years ago, we found multiple uses for a microbe that we had been manufacturing. It would increase the amount of synthetic snow, so less refrigeration power was needed to “powder the slopes”. The same microbe, when injected into Elm trees arrested a disease that was devouring the entire population. Unfortunately, by the time we were done with our studies, there weren’t enough trees left to support a commercial product.