Pest identification
What's eating my japanese nutmeg yew?
Soft scale (Parthenolecanium spp. / Lecanium spp.)
Signs: Rounded brown scales on twigs and stems; honeydew and sooty mould; premature needle yellowing.
Control: Dormant horticultural oil in late winter before bud break. Targeted insecticidal soap sprays on crawler nymphs in early summer.
Conifer aphids (Cinara spp.)
Signs: Colonies of dark aphids on new shoots in spring; honeydew drip; minor shoot distortion.
Control: Insecticidal soap or neem oil spray. Strong water jet to dislodge colonies. Natural predators (ladybirds, lacewings) provide effective control in most years.
Vine weevil (Otiorhynchus sulcatus) — primarily container-grown plants
Signs: Notched leaf edges from adult feeding; larval root damage causing sudden wilt in container specimens.
Control: Soil drench with entomopathogenic nematodes (Steinernema kraussei) in August–October. Avoid overwatering which stresses roots and attracts egg-laying adults.
Keep japanese nutmeg yew pest-free
Healthy plants resist pests best. Get the basics right:
Japanese Nutmeg Yew pests — FAQ
What is eating my japanese nutmeg yew?
Japanese Nutmeg Yew (Torreya nucifera) is rarely troubled by pests in garden cultivation. Scale insects and occasional aphid colonies are the main nuisances. Deer generally avoid the prickly foliage. In its native Japan it faces bark beetles; in cultivation, maintaining good vigour through appropriate moisture and nutrition is the best defence.
How do I get rid of soft scale (parthenolecanium spp. / lecanium spp.) on japanese nutmeg yew?
Rounded brown scales on twigs and stems; honeydew and sooty mould; premature needle yellowing. Dormant horticultural oil in late winter before bud break. Targeted insecticidal soap sprays on crawler nymphs in early summer.
How do I get rid of conifer aphids (cinara spp.) on japanese nutmeg yew?
Colonies of dark aphids on new shoots in spring; honeydew drip; minor shoot distortion. Insecticidal soap or neem oil spray. Strong water jet to dislodge colonies. Natural predators (ladybirds, lacewings) provide effective control in most years.
How do I get rid of vine weevil (otiorhynchus sulcatus) — primarily container-grown plants on japanese nutmeg yew?
Notched leaf edges from adult feeding; larval root damage causing sudden wilt in container specimens. Soil drench with entomopathogenic nematodes (Steinernema kraussei) in August–October. Avoid overwatering which stresses roots and attracts egg-laying adults.