I think this is the article you were wanting to post. It was a combined effort of the American Hemerocallis Society, which provided funding, and the RHS.
https://www.rhs.org.uk/science...
The midge is not a strong flier but can probably be helped along by the wind. They had initial problems with this research at Wisley because the midges didn't find the daylilies and they had to introduce it to the test area.
