Pest identification
What's eating my crataegus laevigata 'paul's scarlet'?
Hawthorn aphid (Dysaphis crataegi)
Signs: Young leaves curl tightly and turn red; heavy honeydew drips and black sooty mold forms
Control: Spray with insecticidal soap or pyrethrin in spring before leaves fully curl; encourage hoverflies and ladybirds
Winter moth and hawthorn moth caterpillars
Signs: Leaves spun together with silk; holes and skeletonizing from April onward
Control: Grease bands on trunk from October; Bt spray when caterpillars are first seen; hand-pick silk-tied clusters
Fireblight (Erwinia amylovora)
Signs: Flowers and shoot tips wilt rapidly and turn brown; cankers girdle branches
Control: Prune 60 cm beyond infection; sterilize tools after every cut; avoid high-nitrogen fertilizers that promote soft growth
Hawthorn shield bug (Acanthosoma haemorrhoidale)
Signs: Puncture marks and wilting on developing berries and soft shoot tips
Control: Population usually self-limiting; hand-pick adults and egg masses in spring if damage is severe
Keep crataegus laevigata 'paul's scarlet' pest-free
Healthy plants resist pests best. Get the basics right:
Crataegus laevigata 'Paul's Scarlet' pests — FAQ
What is eating my crataegus laevigata 'paul's scarlet'?
Crataegus 'Paul's Scarlet' is a magnet for hawthorn aphids and caterpillars in spring, and fireblight poses a serious structural risk. Hawthorn shield bugs and birds also feed on it. Because it is dense and thorny it can harbour pests unnoticed — check inner branches regularly in late spring.
How do I get rid of hawthorn aphid (dysaphis crataegi) on crataegus laevigata 'paul's scarlet'?
Young leaves curl tightly and turn red; heavy honeydew drips and black sooty mold forms Spray with insecticidal soap or pyrethrin in spring before leaves fully curl; encourage hoverflies and ladybirds
How do I get rid of winter moth and hawthorn moth caterpillars on crataegus laevigata 'paul's scarlet'?
Leaves spun together with silk; holes and skeletonizing from April onward Grease bands on trunk from October; Bt spray when caterpillars are first seen; hand-pick silk-tied clusters
How do I get rid of fireblight (erwinia amylovora) on crataegus laevigata 'paul's scarlet'?
Flowers and shoot tips wilt rapidly and turn brown; cankers girdle branches Prune 60 cm beyond infection; sterilize tools after every cut; avoid high-nitrogen fertilizers that promote soft growth
How do I get rid of hawthorn shield bug (acanthosoma haemorrhoidale) on crataegus laevigata 'paul's scarlet'?
Puncture marks and wilting on developing berries and soft shoot tips Population usually self-limiting; hand-pick adults and egg masses in spring if damage is severe