Pest identification
What's eating my aromatic aster?
Aphids
Signs: Small colonies on soft new growth; sticky honeydew and minor leaf distortion; rarely severe on this species
Control: Knock off with water; a single insecticidal soap application usually resolves the problem; natural predators provide good control
Aster Lace Bug (Corythucha marmorata)
Signs: Pale stippled patches on upper leaves in mid to late summer; look for frass on undersides to confirm
Control: Neem oil or insecticidal soap spray targeting leaf undersides; thin interior stems to improve air flow
Tarnished Plant Bug (Lygus lineolaris)
Signs: Flower buds that abort or produce misshapen petals; small brown punctures on stems
Control: Weed surrounding areas where adults overwinter; pyrethrin sprays target active nymphs; sticky traps help monitor populations
Keep aromatic aster pest-free
Healthy plants resist pests best. Get the basics right:
Aromatic Aster pests — FAQ
What is eating my aromatic aster?
Aromatic Aster's strong fragrance deters many pests, making it one of the most pest-resistant native asters. Aphids are still occasionally present on new growth, and lace bugs can appear in warm summers. Deer and rabbits generally avoid it due to the scent, giving it a practical advantage over less aromatic asters.
How do I get rid of aphids on aromatic aster?
Small colonies on soft new growth; sticky honeydew and minor leaf distortion; rarely severe on this species Knock off with water; a single insecticidal soap application usually resolves the problem; natural predators provide good control
How do I get rid of aster lace bug (corythucha marmorata) on aromatic aster?
Pale stippled patches on upper leaves in mid to late summer; look for frass on undersides to confirm Neem oil or insecticidal soap spray targeting leaf undersides; thin interior stems to improve air flow
How do I get rid of tarnished plant bug (lygus lineolaris) on aromatic aster?
Flower buds that abort or produce misshapen petals; small brown punctures on stems Weed surrounding areas where adults overwinter; pyrethrin sprays target active nymphs; sticky traps help monitor populations