Pest identification
What's eating my japanese tree lilac 'ivory silk'?
Lilac Borer (Podosesia syringae)
Signs: Frass-filled holes at the trunk base; dieback of affected scaffold branches
Control: Protect bark from mower damage; apply permethrin to trunk in spring when adult moths fly
Oystershell Scale
Signs: Oyster-shaped gray bumps on bark; dieback and reduced vigor on infested branches
Control: Horticultural oil in late winter; target crawlers with contact insecticide in late spring
Aphids
Signs: Sticky, curled new leaves in spring; sooty mold on surfaces below colonies
Control: Insecticidal soap or neem oil; natural predators typically collapse populations before serious damage
Keep japanese tree lilac 'ivory silk' pest-free
Healthy plants resist pests best. Get the basics right:
- What eats japanese tree lilac — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Common japanese tree lilac 'ivory silk' problems & fixes
- Japanese Tree Lilac 'Ivory Silk' watering schedule
- Japanese Tree Lilac 'Ivory Silk' light requirements
- Full japanese tree lilac 'ivory silk' care guide
Japanese Tree Lilac 'Ivory Silk' pests — FAQ
What is eating my japanese tree lilac 'ivory silk'?
'Ivory Silk' Japanese Tree Lilac shares the same pests as other lilacs but is somewhat more tolerant due to its tree form and thick bark. Lilac borers and oystershell scale are the primary threats. Its late summer bloom means aphid pressure has usually eased by flowering. Borer prevention via bark protection is the key maintenance task.
How do I get rid of lilac borer (podosesia syringae) on japanese tree lilac 'ivory silk'?
Frass-filled holes at the trunk base; dieback of affected scaffold branches Protect bark from mower damage; apply permethrin to trunk in spring when adult moths fly
How do I get rid of oystershell scale on japanese tree lilac 'ivory silk'?
Oyster-shaped gray bumps on bark; dieback and reduced vigor on infested branches Horticultural oil in late winter; target crawlers with contact insecticide in late spring
How do I get rid of aphids on japanese tree lilac 'ivory silk'?
Sticky, curled new leaves in spring; sooty mold on surfaces below colonies Insecticidal soap or neem oil; natural predators typically collapse populations before serious damage