Pinus Densithunbergii (Pinus densithunbergii)

Pinus densithunbergii · Dense-needled Japanese pine

By Kevin Published 21 July 2026 Last reviewed 22 July 2026 Family: Pinaceae

pinus-densithunbergii documentary photo

☀️ Full sun 📏 20–35 m 🌿 Tree

At a Glance

Botanical name	Pinus densithunbergii
Common name(s)	Dense-needled Japanese pine
Family	Pinaceae
Plant type	tree (Hybrid between Pinus densiflora and Pinus thunbergii)
Height × Spread	20–35 m × —
Position	Full sun
Soil	well-drained, slightly acidic soil
Flowering	—
Toxicity	—
Native range	East Asia and Siberia

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Problem	Symptoms	Management
Pine shoot moth	New shoots wilt, turn brown and die, often accompanied by visible webbing or sawdust-like frass.	Apply a systemic insecticide in early spring when new growth emerges to target larvae.
Conifer aphid	Clusters of small insects on new shoots causing stunted growth and sticky honeydew residue.	Spray with a suitable insecticide or use horticultural oil during the growing season.
Needle cast disease	Older needles turn brown, fail to drop naturally, and may show fungal spores between them.	Improve air circulation and apply a fungicide in spring before new growth expands.
Honey fungus	General decline, yellowing foliage, and white fungal mycelium or black roots at the base.	Ensure well-drained soil and remove infected plants to prevent spread to nearby trees.
Sawfly larvae	Green caterpillar-like larvae skeletonize needles, leaving behind only the midribs.	Hand-pick larvae or apply an insecticide if infestation levels are high.

For step-by-step help, read Controlling Aphids Naturally. Or browse the full plant problem solver to diagnose an issue by symptom.