Shot-hole Disease Of Laurel

Disease Information

Shot-hole Disease

COMMENTS on disease

Shot-hole disease can affect all varieties of Prunuslaurocerasus and Prunuslusitanica and is caused by a bacterial pathogen called Pseudomonas syringaepvsyringae or the fungi Stigmina and Eupropolella.

Shot-hole disease tends to be more of a problem on nurseries that use overhead irrigation (sprinklers) to water their plants as the disease is spread from plant to plant by water splash on the leaves. Shot-hole is not a disease that will threaten the life of a laurel and most plants will grow out of the problem once the growing conditions change (i.e. the laurel are planted into the ground where they do not need to be watered with sprinklers or the weather becomes drier) and new leaves are produced that cover up the diseased leaves.

SYMPTOMS

Brown leaf spots between 2 and 10mm in diameter that eventually drop out to leave the leaf looking like it has been shot with a shot-gun.

Management

Chemical control is not necessary. Laurel plants will grow through the disease when the weather or growing conditions change. When the plants put on new growth, it will cover up the disease.

Do not water the leaves, water the soil around the base of the plant when watering a plant.

 



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