Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Dogwood > Small piles of sawdust on stem
Dogwood > Stems/branches > Small piles of sawdust on stem
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Dogwood borer
Synanthedon scitula
- Holes and brown colored frass around pruning scars, injuries and burr knots
- Crown dieback
- Epicormic growth beneath infested area on tree
- Particularly a pest of flowering dogwood
- More information on Dogwood borer
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Dogwood twig borer
Oberea tripuncata
- Larval tunnels inside branches, making holes in stems to push out frass and sawdust
- Larvae feed downward, holes often occur near outside end of branches
- Larval feeding cases leaves on random branches to wilt and turn brown
- Adults chew on the underside of midrib of leaves causing the leaf to curl downward at tip
- More information on Dogwood twig borer
