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Detection of High plains virus in Western Australia

 
old revision
Publication Date
Fri, 23 Jun 2023, 05:38
Last Updated
June 23, 2023, 5:38 a.m.
Report Number
AUS-55/3
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.
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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