Troubleshooting
Vranja quince problems — and how to fix them
Vranja quince (Cydonia oblonga 'Vranja') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Quince leaf blight (Diplocarpon mespili / Entomosporium mespili)
Fungal disease causing reddish-brown spots on leaves, leading to premature defoliation. Wet spring and early-summer conditions favour infection. Rake and destroy fallen leaves. Apply copper-based fungicide at bud break and again at petal fall.
Brown rot (Monilinia fructigena)
Fruit rots on the tree or in storage, covered in concentric rings of grey-brown spore pustules. Remove and destroy affected fruit promptly. Prune to maintain airflow. Avoid wounding fruit during thinning or harvesting.
Codling moth (Cydia pomonella)
Larvae tunnel into fruit causing premature drop and internal decay. Monitor adult flight with pheromone traps. Apply kaolin clay or an approved insecticide timed to egg hatch in late spring. Remove and destroy fallen fruitlets.
Prevent vranja quince problems before they start
Most vranja quince issues are care-mismatch, not bad luck. Dial in the basics:
Vranja quince problems — FAQ
Why is my vranja quince quince leaf blight (diplocarpon mespili / entomosporium mespili)?
Fungal disease causing reddish-brown spots on leaves, leading to premature defoliation. Wet spring and early-summer conditions favour infection. Rake and destroy fallen leaves. Apply copper-based fungicide at bud break and again at petal fall.
Why is my vranja quince brown rot (monilinia fructigena)?
Fruit rots on the tree or in storage, covered in concentric rings of grey-brown spore pustules. Remove and destroy affected fruit promptly. Prune to maintain airflow. Avoid wounding fruit during thinning or harvesting.
Why is my vranja quince codling moth (cydia pomonella)?
Larvae tunnel into fruit causing premature drop and internal decay. Monitor adult flight with pheromone traps. Apply kaolin clay or an approved insecticide timed to egg hatch in late spring. Remove and destroy fallen fruitlets.