Detection of Rice blast (caused by Magnaporthe grisea) in the Ord River Irrigation Area (ORIA) of Western Australia

Publication Date

Mon, 22 Aug 2011, 00:00

Last Updated

June 30, 2015, 6:21 a.m.

Report Number

AUS-46/2

Country

Australia

Pest Id

Magnaporthe oryzae - (PYRIOR)

Report Status

Final

Hosts

Rice - Oryza sativa - cultivar Quest

Pest Status (old values from ISPM 8 -1998 )

• Present: subject to official control

Pest Status (ISPM 8 - 2021)

• Present: not widely distributed and under official control

Geographical Distribution

Detected in five commercial rice crops in the ORIA of Western Australia

Summary

A delimiting survey in Western Australia has determined that rice blast is only present in the isolated Ord River Irrigation Area (ORIA). Quarantine measures have been imposed on all ORIA rice growing properties to prevent the movement of rice plant material, machinery and equipment associated with rice crops.

Danger

Rice blast, caused by Magnaporthe grisea, is generally considered an important disease of rice worldwide because of its extensive distribution and destructiveness under favourable conditions. Rice blast is not present in the New South Wales Riverina region where 99% of Australian rice is grown and strict quarantine regulations are in place to prevent the entry of diseases. This outbreak in northern Western Australia is not likely to pose a threat to the Riverina rice growing region as it is nearly 3000 km away.

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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