Back

Barley yellow dwarf virus

Barley yellow dwarf virus

Description

The most important virus diseases of cereals worldwide, with a wide host range which includes wheat, barley, oats, triticale and over 150 grass species.

Symptoms

  • Appear at least 3 weeks after infection
  • Yellowing and chlorosis may be mild to severe
  • Early severe infections may result in poorly developed tillers, reddening of flag leaves, delayed maturity, and shrivelled grain 
  • Late infections may only cause slight incidences of shriveled grain

Damage

  • Early heavy infections can cause severe yield loss

Control

Some wheat varieties are resistant to barley yellow dwarf virus. Management of aphid activity in crops using insecticides or cultural control methods to encourage predation by beneficials can be very effective. Crops can be sown later to avoid main aphid flights when wet summers and autumns occur.

Links and Resources

DEPI VIC - Identification and management of field crop diseases in Victoria. Barley yellow dwarf virus

Introduction, what to look for, wheat symptoms, disease cycle, hosts, virus management. Published 2012.

DEPI VIC - Barley Yellow Dwarf Virus

Introduction, symptoms in barley, wheat and oats, economic importance, disease cycle, and management. Published 2003, updated 2011.

GRDC - Barley yellow dwarf virus Fact Sheet

4 page PDF. Key points, transmission, yield loss, aphid feeding, predicting infection, management, resistance, green bridge, and frequently asked questions. Published 2013.

Victorian winter crop summary 2014 - Barley yellow dwarf virus

Table 6: Wheat disease guide. Page 11. Causal organism, symptoms, occurrence, inoculum source, and control. Updated annually.