There's plenty of examples of pests being introduced to kill other greenhouse pests, but most of these die off in the absence of other pests or in the cold (such as the Encarsia wasp which controls whitefly) what is different about this control species, is that it is being released into the outside environment, and one assumes it can survive our winters. What happens when its food source runs out? Will some gradually adapt to feed off other plants?
I hope their outside trials are in areas which are covered/protected with insect netting... and the trial species are comprehensive to contain not just "native plants" but a wode range of others as well