Pest identification
What's eating my ceanothus thyrsiflorus 'skylark'?
Scale insects (greedy scale, Hemiberlesia rapax)
Signs: Grey armoured scale encrusts twigs; heavy infestations cause yellowing, dieback of shoots, and reduced flowering.
Control: Apply horticultural oil in late winter before bud break; ensure ants are controlled to allow natural parasitoids to operate.
Aphids
Signs: Soft colonies on spring growth; honeydew, sooty mould, curled or distorted leaves.
Control: Water jet to remove; encourage ladybirds and lacewings. Insecticidal soap if needed.
Spider mites
Signs: Fine pale stippling on leaf surfaces in dry heat; severe cases cause bronzing and early leaf drop.
Control: Hose foliage regularly; predatory mites or horticultural soap for control.
Keep ceanothus thyrsiflorus 'skylark' pest-free
Healthy plants resist pests best. Get the basics right:
- What eats blue blossom — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Common ceanothus thyrsiflorus 'skylark' problems & fixes
- Ceanothus thyrsiflorus 'Skylark' watering schedule
- Ceanothus thyrsiflorus 'Skylark' light requirements
- Full ceanothus thyrsiflorus 'skylark' care guide
Ceanothus thyrsiflorus 'Skylark' pests — FAQ
What is eating my ceanothus thyrsiflorus 'skylark'?
Ceanothus thyrsiflorus 'Skylark' has a clean pest record but is susceptible to scale insects, including greedy scale confirmed by UC IPM as a host. Aphids may colonise new growth in spring, and spider mites can appear in hot, dry summers. Pest pressure is generally low on well-sited, unwatered-in-summer plants.
How do I get rid of scale insects (greedy scale, hemiberlesia rapax) on ceanothus thyrsiflorus 'skylark'?
Grey armoured scale encrusts twigs; heavy infestations cause yellowing, dieback of shoots, and reduced flowering. Apply horticultural oil in late winter before bud break; ensure ants are controlled to allow natural parasitoids to operate.
How do I get rid of aphids on ceanothus thyrsiflorus 'skylark'?
Soft colonies on spring growth; honeydew, sooty mould, curled or distorted leaves. Water jet to remove; encourage ladybirds and lacewings. Insecticidal soap if needed.
How do I get rid of spider mites on ceanothus thyrsiflorus 'skylark'?
Fine pale stippling on leaf surfaces in dry heat; severe cases cause bronzing and early leaf drop. Hose foliage regularly; predatory mites or horticultural soap for control.