Cryphonectria parasitica - Jersey

Publication Date

Wed, 05 Oct 2022, 10:48

Last Updated

Dec. 17, 2024, 4:52 p.m.

Report Number

GBR-41/5

Country

United Kingdom

Pest Id

Cryphonectria parasitica - (ENDOPA)

Report Status

Final

Hosts

Castanea sativa. (Sweet Chestnut)

Pest Status (ISPM 8 - 2021)

• Present: widely distributed

Geographical Distribution

As of the end of 2023 - widely distributed cross Jersey but in limited numbers. A single previous case of Cryphonectria parasitica was detected in November 2019 affecting a small copse of sweet chestnut – that outbreak was eradicated. Surveys carried out in July and November 2022 at 120 locations across the island identified 9 individual diseased trees in 7 individual locations. The 2023 survey included the same 120 locations of the 2022 survey as well as including areas of eastern parishes not previously covered. The 2023 survey identified 3 additional diseased trees in 3 different locations. Summary: surveys up to the end of 2023 have identified 12 individual trees at 10 locations on Jersey.

Summary

The first reported finding of Cryphonectria parasitica (Sweet Chestnut Blight) by the Crown Dependency of Jersey.

Danger

The origin of the outbreak is not yet known. C. parasitica infection is usually fatal to European (Castanea sativa) and North American (C. dentata) sweet chestnut trees. It has almost wiped out North America's sweet chestnut population. Although losses have not been on the same scale in Europe, sweet chestnut blight has spread steadily throughout much of Europe, and tree losses have been regionally significant. There are no commercial plantings of Sweet Chestnut in Jersey. Pollarding / cutting of trees in local hedgerows is commonplace and movement of cut wood suggests that the risk of spread is high. Jersey has a large population of red squirrels (Sciurus vulgaris) that feeds on seeds, there is a risk of disease transmission via distribution of seeds.

Contact for info

[email protected]

Report files

Cryphonectria parasitica outbreak report - Jersey

Website

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