Pest identification
What's eating my physocarpus opulifolius 'diabolo'?
Aphids
Signs: Colonies on soft shoot tips; honeydew and slight leaf curl, most noticeable on tender new growth.
Control: Spray with insecticidal soap or neem oil; encourage ladybirds and hoverflies.
Leaf-rolling caterpillars
Signs: Leaves rolled and bound with silk; feeding damage inside the roll, deforming foliage.
Control: Unroll and hand-pick larvae; Bt spray at egg-hatch timing (early spring).
Rabbits
Signs: Bark gnawed from the base of young stems, potentially ring-barking and killing stems.
Control: Fit spiral guards or fine-mesh cylinders to 60 cm above ground level.
Keep physocarpus opulifolius 'diabolo' pest-free
Healthy plants resist pests best. Get the basics right:
Physocarpus opulifolius 'Diabolo' pests — FAQ
What is eating my physocarpus opulifolius 'diabolo'?
Diabolo ninebark is impressively pest-tolerant, but aphids and leaf-rolling caterpillars can affect new purple growth in spring. Powdery mildew and leaf spots are more common concerns than insects. Rabbits occasionally strip bark of young stems in winter, and deer may browse soft shoot tips.
How do I get rid of aphids on physocarpus opulifolius 'diabolo'?
Colonies on soft shoot tips; honeydew and slight leaf curl, most noticeable on tender new growth. Spray with insecticidal soap or neem oil; encourage ladybirds and hoverflies.
How do I get rid of leaf-rolling caterpillars on physocarpus opulifolius 'diabolo'?
Leaves rolled and bound with silk; feeding damage inside the roll, deforming foliage. Unroll and hand-pick larvae; Bt spray at egg-hatch timing (early spring).
How do I get rid of rabbits on physocarpus opulifolius 'diabolo'?
Bark gnawed from the base of young stems, potentially ring-barking and killing stems. Fit spiral guards or fine-mesh cylinders to 60 cm above ground level.