Holly Twig Dieback
Cylindrocladium buxicola
This description was machine-translated.
How to spot it
Holly twig dieback is caused by the fungus Cylindrocladium buxicola and is one of the most serious diseases of holly.
Early signs are brown spots on the leaves and black longitudinal streaks on young shoots, which spread quickly into entire brown nests in wet weather.
On the underside of the leaf you often see a fine white fungal network, shortly after which the foliage drops in clumps and branches turn brown from inside out.
Prevention
Choose a well‑ventilated, sunny to partially shaded location and trim the crown regularly, lightly, so that leaves dry quickly after rain.
Remove infected shoots generously to healthy wood and dispose of the cuttings in household waste instead of compost.
Disinfect the scissors between cuts and between different plants to avoid transmission.
Water from below instead of over the leaves and plant new holly trees with enough spacing between them so the crown stays well ventilated.
Affected plants
These plants in our database are especially susceptible.
Not sure what is wrong with your plant?
Take a photo and let the AI diagnosis identify diseases and pests.
Start photo diagnosis