Detection of Cowpea mild mottle virus (Carlavirus) in Queensland

 

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Publication Date

Fri, 23 Jun 2023, 05:19

Last Updated

June 23, 2023, 5:19 a.m.

Report Number

AUS-83/1

Country

Australia

Pest Id

Cowpea mild mottle carlavirus - (CPMMV0)

Report Status

Final

Hosts

Common bean (Phaseolus vulgaris), peanut (Arachis hypogaea), tomato (Solanum lycopersicum), chia (Salvia hispanica), cowpea (Vigna unguiculata) and soybean (Glycine max).

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

Fassifern and Lockyer Valley, Queensland

Summary

Cowpea mild mottle virus is known to cause severe distortion, twisting and discolouration of the pods as well as mosaic/mottling symptoms on leaves in beans. The virus infects peanut (Arachis hypogaea) and tomato (Solanum lycopersicum), in addition to chia, common bean (Phaseolus vulgaris), cowpea (Vigna unguiculata) and soybean. Cowpea mild mottle virus is transmitted by whitefly (Bemisia tabaci) in a non-persistent manner. The virus is also transmitted through cowpea and soybean seed. Disease incidence in bean crops inspected in Fassifern, Queensland was high-between 50%-90% symptomatic plants. Several bean crops were not harvested due to severe pod damage and beans from other crops have been downgraded or require considerable sorting in the pack house to remove affected pods.

Work to determine host range and mode of transmission, reduce disease inoculum over winter and to minimise impact on growers is in progress.

Danger

Cowpea mild mottle virus has been detected in Australia in two locations (Fassifern and Lockyer Valley, Queensland) on three hosts French bean cv Wyatt (mainly) (Phaseolus vulgaris), soybean (Glycine max) and chia (Salvia hispanica).

Contact for info

Australian Chief Plant Protection Officer Australian Government Department of Agriculture and Water Resources GPO Box 858 Canberra ACT 2601 [email protected]

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