Pest identification
What's eating my japanese cedar 'spiralis'?
Cryptomeria scale
Signs: Flat armored scales on spiraling stems and needles; yellowing foliage; honeydew and sooty mold accumulate in twisted fronds
Control: Apply horticultural oil spray in late winter; follow up in early summer; brush out debris caught in twisted foliage to remove overwintering scales
Spider mites
Signs: Stippled, bronzed foliage with fine webbing, particularly in the interior during hot dry weather
Control: Mist foliage in hot spells; apply neem oil or miticide spray; ensure adequate soil moisture to reduce heat stress
Aphids
Signs: Clustering on new shoot tips in spring; sticky honeydew and minor leaf curl on young growth
Control: Wash off with a water jet; treat with insecticidal soap if colonies persist; lady beetles and lacewings provide natural control
Keep japanese cedar 'spiralis' pest-free
Healthy plants resist pests best. Get the basics right:
- What eats japanese cedar bonsai — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Common japanese cedar 'spiralis' problems & fixes
- Japanese Cedar 'Spiralis' watering schedule
- Japanese Cedar 'Spiralis' light requirements
- Full japanese cedar 'spiralis' care guide
Japanese Cedar 'Spiralis' pests — FAQ
What is eating my japanese cedar 'spiralis'?
Cryptomeria japonica 'Spiralis' (granny's ringlets) has gently twisted foliage that can trap moisture and debris, making it slightly more susceptible to scale and fungal issues than upright forms. Scale insects are the primary pest; spider mites appear in dry summers. Good air circulation and avoiding overhead watering are the best preventive measures.
How do I get rid of cryptomeria scale on japanese cedar 'spiralis'?
Flat armored scales on spiraling stems and needles; yellowing foliage; honeydew and sooty mold accumulate in twisted fronds Apply horticultural oil spray in late winter; follow up in early summer; brush out debris caught in twisted foliage to remove overwintering scales
How do I get rid of spider mites on japanese cedar 'spiralis'?
Stippled, bronzed foliage with fine webbing, particularly in the interior during hot dry weather Mist foliage in hot spells; apply neem oil or miticide spray; ensure adequate soil moisture to reduce heat stress
How do I get rid of aphids on japanese cedar 'spiralis'?
Clustering on new shoot tips in spring; sticky honeydew and minor leaf curl on young growth Wash off with a water jet; treat with insecticidal soap if colonies persist; lady beetles and lacewings provide natural control