Recently transplanted hostas are developing white spots on leaves. Is this...
The white spots on your hosta looks like sunburn, damage from the sun. This does not look like an insect or disease problem. You did not mention the site where the hostas were transplanted. Best performance is in a moist, well draining soil in full or partial shade. They prefer high-filtered shade with one-quarter to one-half of the day in morning sun. Hot afternoon sun will scorch most hostas.