Pest identification
What's eating my lily magnolia?
Vine weevil (Otiorhynchus sulcatus)
Signs: Notched leaf edges; white grubs destroy roots causing wilting and dieback, worst in pots
Control: Nematode soil drench (Steinernema kraussei) in late summer; check roots at repotting
Horse chestnut scale (Pulvinaria regalis)
Signs: White cottony egg masses on bark in late spring; weakens branches if infestation is heavy
Control: Horticultural oil in late winter; scrape off visible scale from small branches by hand
Slugs and snails
Signs: Irregular holes and slime trails on young leaves at ground level, mainly on newly planted specimens
Control: Iron phosphate slug pellets around base; physical barriers; check under mulch and remove by hand at dusk
Deer
Signs: Browsed and stripped lower branches and bark rubbing by antlers in autumn and winter
Control: Tree guards on young specimens; deer repellent spray; fencing in high-pressure areas
Keep lily magnolia pest-free
Healthy plants resist pests best. Get the basics right:
Lily Magnolia pests — FAQ
What is eating my lily magnolia?
Lily Magnolia (Magnolia liliiflora) faces scale insects on stems, aphids on young growth, and vine weevil damage to roots. Slugs attack young plants near the base. Deer will browse low-hanging branches in rural gardens. Overall, magnolias are relatively pest-resistant; the main risk is vine weevil in containers.
How do I get rid of vine weevil (otiorhynchus sulcatus) on lily magnolia?
Notched leaf edges; white grubs destroy roots causing wilting and dieback, worst in pots Nematode soil drench (Steinernema kraussei) in late summer; check roots at repotting
How do I get rid of horse chestnut scale (pulvinaria regalis) on lily magnolia?
White cottony egg masses on bark in late spring; weakens branches if infestation is heavy Horticultural oil in late winter; scrape off visible scale from small branches by hand
How do I get rid of slugs and snails on lily magnolia?
Irregular holes and slime trails on young leaves at ground level, mainly on newly planted specimens Iron phosphate slug pellets around base; physical barriers; check under mulch and remove by hand at dusk
How do I get rid of deer on lily magnolia?
Browsed and stripped lower branches and bark rubbing by antlers in autumn and winter Tree guards on young specimens; deer repellent spray; fencing in high-pressure areas