Detection of High plains virus in Western Australia

 

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Publication Date

Tue, 30 Jun 2015, 06:27

Last Updated

June 30, 2015, 6:27 a.m.

Report Number

AUS-55/2

Country

Australia

Pest Id

Wheat high plains virus - (WHPV00)

Report Status

Final

Hosts

Triticum aestivum

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

Western Australia, New South Wales (NSW), Victoria and Queensland

Summary

HPV is transmitted by the Wheat curl mite (Aceria tosichella). Symptoms are very similar to those for WSMV and include:

• Leaf mottling (mosaic) and leaf streaking.

• Light green streaks running parallel to the leaf veins.

These streaks turn yellow and develop into blotches, giving the leaf a green and yellow pattern called a ‘mosaic’.

• Tillers on affected plants tend to be less erect than those on uninfected plants. • Affected plants can die prematurely or fail to grow, becoming stunted relative to healthy plants.

• Heads on infected plants can be sterile and contain no seed, or can contain small to shrivelled grain. Globally in the field, HPV has been found infecting wheat (Triticum aestivum), maize (Zea mays), green foxtail (Setaria viridis) and yellow foxtail (Setaria glauca). Additional experimentally susceptible species include ‘Victory’ oats (Avena sativa), cheat (Bromus secalinus), barley (Hordeum vulgare), and rye (Secale cereale)

Danger

High plains virus (HPV) has recently been detected in Western Australia in several wheat crops which were also infected with Wheat streak mosaic virus (WSVM). The incidence of HPV was low (1%). It has previously been detected in eastern Australia in NSW, Victoria and Queensland. HPV may affect the yield potential of wheat crops but does not present any further production or market access constraints over those which exist with WSMV, detected in Australia in 2002.

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