I posted my results with respect to the Lily Beetle. Believe it was entitled" "Lily Beetle Revisited". I talked about an available very small wasp, the size of a fruit fly, which only attacks the black Lily Beetle Larvae, located on the underside of lily leaves. If you google lily beetle and wasps, it should come up. Several US and Can
universities giving the wasps free if you want to follow their study rules. I am impressed after only the first year.