Lilioceris lilii) can devastate your lilies in a matter of days if not taken care of when you see this sort of damage.
|Lily foliage with marginal holes|
|Here they are breeding|
Look for red little eggs, laid in a row too. These beetles are aggressive in breeding, they reproduce rather quickly.
Neem oil is a great alternative to controlling eggs and their larvae stage. Unlike the adult stage, Lily Beetle larvae have soft bodies. Neem oil coats them, when sprayed on contact and penetrates through their soft skin, killing them off.
|Beetle larvae (1cm long)|
|Larvae can be anywhere from brown to an orange-red colouration.|