Alya. Your pink lily is a beauty and the beetle is herein the US. I control with pesticides.I know those are damning words to some but an early spring drench around the emerging plants seems to keep the beetles under control.
I have too many lilies to hand pick and kill the red devils.
Word has it there is a wasp introduced to eradicate the beetle, it likes the beetle larva.This means we will have a wasp pest in a few years.
Seems it never ends.
