I have seen leaf miner tracks on daylilies for a few years. Since I had leaf miner tracks on
columbine that was growing in the daylily beds, I thought the columbine leaf miner
had transferred onto daylilies. Over the years, no daylilies died, but the leaves were
unsightly.
The columbines were removed from the beds, but now I learn there is a leaf miner
specific to daylilies. Also, this past season, we saw yellow larva on one daylily located
at the base of the leaves which looks like the online photo of the daylily leaf miner.
Systemic insecticide was sprayed early in the year for thrips, but did nothing to
eradicate leaf miners.
Does anyone know if the daylily leaf miner can cause considerable damage to
the health of daylilies if or when populations increase substantially?
