One of the sellers I bought from last season gifted me with leaf miners, and I ended up with a pretty bad infestation. When I posted here about it I was told that they would overwinter. (I truly didn't think that would happen this far north!)
This psychotic weather, polar vortex and all, has presented us with an extended period of sub-zero temperatures, at times dipping to -18 F. We've had brief periods of snow cover until recently, and cover for the past week or so.
Would this possibly be enough to kill off the leaf miner larva currently hiding in my daylilies?