Posted: 20/06/2016 at 13:25
hello everyone, I do agree the only good Lilly beetle is a dead one! I am a private grower and have the following information: these little beetles are vibrationally aware and so drop onto their backs as you approach and blend in with the soil as their underside is black. The only saving grace is that they wont eat anything else so with any damage to lilies you know its them. The spray that kills them (spray the underside of the leaves as well) is PROVADO ultimate bug killer - I have been using it for years. But Yes, I still have to pick the odd one off occasionally. I would Never leave the egg/grub which is covered in bug pooh to live but just pull them off the leaf with tissue dont actually take off the leaf. Best of luck everyone.
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Donna, as far as I know all insects are 'vibrationally aware'. It is true that the Red Lilly beetles' tactic is to drop onto their backs. But you don't have to be that quick to pick them off by hand and I'm surprised that some people find it difficult to do this, excepting those who may have a problem with movement.
The RHS webpage on these creatures also suggests picking them off by hand, but also provides a list of sprays that kills them. Also, while it's true that lily beetles only feed on that plant, there other creatures that will eat lily leaves, such as the larvae (caterpillar) of the Totrix moth.