Lilac > Stems/branches > Holes in stems
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Lilac Borer (also known as ash borer)
- Wilted or dead stems
- Base of stem swollen with ¼ inch exit holes
- Sap, sawdust and frass exuding from holes
- Reddish-brown pupa cases sometimes found protruding from exit holes
- Larvae are 1' long; creamy white with light brown head
- Adult is a clear wing moth that resembles paper wasp; smoky brown forewing, hindwing is clear with brown edge.
- More information on Lilac borer...