Effective control of barley yellow dwarf virus (BYDV) in wheat 2016 trial report

Page last updated: Tuesday, 18 July 2017 - 7:25am

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Yellow dwarf viruses (YDV) are the most damaging viruses of cereals. Tolerant varieties are the most effective way of combating the viruses, but sources of tolerance from existing wheat cultivars are yet to be tested for.

Yellow dwarf viruses (barley YDV and cereal YDV) are transmitted by several aphid species. The effect of the disease on yield depends on the viral species or strain, time of infection and rate of spread. 10% yield losses may occur without visible symptoms of infection, with severe losses approaching 80% when infection is early. Breeding resistant/tolerant wheat varieties requires accurate identification and phenotyping from current cultivars. This trial will assess 300 wheat genotypes adapted to high rainfall areas for yellow dwarf virus resistance/tolerance.

Table 1 Trial details
Site Manjimup Research Station
Season 2016-2017
Treatments

300 wheat genotypes

Two treatments

  1. High BYDV - natural BYDV spread; no insecticide or virus control measures.
  2. Low BYDV - seed dressings containing imidacloprid; then pyrethroid spray three weeks after emergence; second pyrethroid spray seven weeks after emergence.

Six replicates/treatment

Crop Wheat: Mace
Fertiliser Deep band compound fertiliser (Agstar 100kg/ha) at seeding
Herbicide Non-selective knockdown herbicide

Contact information

Brenda Coutts
+61 (0)8 9368 3266

Author

Brenda Coutts

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