Pest identification
What's eating my allium 'gladiator'?
Allium leaf miner (Phytomyza gymnostoma)
Signs: Characteristic white stippling lines on leaves, then maggots boring into stems and bulbs causing collapse and rot.
Control: Protect with insect-proof fleece in spring and autumn when the fly is active. Remove and destroy affected plants.
Onion thrips (Thrips tabaci)
Signs: Silvery-white streaking on leaves; reduced vigour and flower quality in severe infestations.
Control: Apply neem oil or insecticidal soap; keep surrounding weeds cleared; introduce predatory mites as biological control.
Slugs and snails
Signs: Holes in soft new foliage during wet spring periods; emerging tips most vulnerable.
Control: Ferric phosphate pellets; bark-chip mulch; night patrols with a torch for hand-picking.
Keep allium 'gladiator' pest-free
Healthy plants resist pests best. Get the basics right:
Allium 'Gladiator' pests — FAQ
What is eating my allium 'gladiator'?
Allium 'Gladiator' shares the genus's inherent pest-deterrent properties, making it one of the more trouble-free garden bulbs. Allium leaf miner is the most damaging pest in UK and northern US gardens. Thrips and slugs are secondary risks on new spring growth. Deer and rabbits rarely touch it.
How do I get rid of allium leaf miner (phytomyza gymnostoma) on allium 'gladiator'?
Characteristic white stippling lines on leaves, then maggots boring into stems and bulbs causing collapse and rot. Protect with insect-proof fleece in spring and autumn when the fly is active. Remove and destroy affected plants.
How do I get rid of onion thrips (thrips tabaci) on allium 'gladiator'?
Silvery-white streaking on leaves; reduced vigour and flower quality in severe infestations. Apply neem oil or insecticidal soap; keep surrounding weeds cleared; introduce predatory mites as biological control.
How do I get rid of slugs and snails on allium 'gladiator'?
Holes in soft new foliage during wet spring periods; emerging tips most vulnerable. Ferric phosphate pellets; bark-chip mulch; night patrols with a torch for hand-picking.