White Pine Blister Rust


White Pine Blister Rust

Cronartium ribicola


In a Nutshell

    Yellow spots on the underside of the leavesBrown elevated fungal threads

Hosts: %1$s

· Gooseberry · Currant


Yellow spots appear on the upper leaf surface in early summer and the underside of the leaf displays yellowish blisters. Later, brownish-yellow fungal threads grow on the underside of the leaves. Unlike other fungi, they do not have the form of a film or layer, but are clearly elevated. At a final stage of infection with White Pine Blister Rust, leaves fall off.


White Pine Blister Rust is not a serious disease for alternate hosts such as currants and gooseberries, but is a very serious disease for Pines. The fungal spores are transported by wind and can be carried over very long distances. Fungi generally prefer a warm, humid climate, so locations with good ventilation are needed to dry quickly after rainfall.

Biological Control

Remove infected foliage as soon as possible and cut back affected parts of the plant.

Chemical Control

There are no fungicides available to treat the White Pine Blister Rust on currants and gooseberries.

Preventive Measures

    Leave sufficient space between plants to ensure good ventilationDon’t plant currants and gooseberries in close proximity to pine treesPlant less vulnerable varieties


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