I would like to ask what to do with Japanese Beatles. I am spaying with all kind of products, they don't eat my leaves but they go and eat the new flowers. The biggest problem are hibiscus, canna, crepe myrtle and roses.In one day a whole flower is eaten by one beatle. I can't spay every new bud. I use to have them on roses last year but this year they eat everything. I don't have any invasion of many, here are always 4-6 and it is enough to do a huge damage. Please, is there any help?