Presence of Cryptosporiopsis citri in Northern Territory and Queensland

 

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Publication Date

Fri, 23 Jun 2023, 05:40

Last Updated

June 23, 2023, 5:40 a.m.

Report Number

AUS-53/3

Country

Australia

Pest Id

Cryptosporiopsis citri - (CYPTCI)

Report Status

Final

Hosts

Citrus

Pest Status (old values from ISPM 8 -1998 )

• Present: only in some areas

Pest Status (ISPM 8 - 2021)

• Present: not widely distributed and under official control

Geographical Distribution

The pathogen has been detected in a few non-commercial trees in the Northern Territory and Queensland. It is not widespread, but under conducive conditions it is controlled by normal orchard practices. It has not been detected in native citrus.

Summary

Extensive survey of citrus suggests that the pathogen may occur at a very low incidence and especially in wetter conditions in non-commercial trees. Affected citrus show circular leaf spots, 3-5 mm in diameter, slightly depressed, pale grey to brown with dark-brown border. Symptoms are seen more on older leaves but not fruit and may cause some defoliation.

Danger

C. citri occurs on all species of citrus in most of the Pacific Islands. It is a minor leaf spot disease that poses little threat to the citrus industry. The pathogen is not seed borne and fruit are not considered a risk pathway.

Contact for info

Australian Chief Plant Protection Officer Australian Government Department of Agriculture, GPO Box 858 Canberra ACT 2601 Australia [email protected]

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