Field pea: pea seed-borne mosaic virus guide for preparing for 2018

Page last updated: Thursday, 22 March 2018 - 2:31pm

For 2018, pea growers will make the decision to sow (i) 2017 harvested seed or (ii) purchase new seed. In the case of (i), it is extremely important to get seed tested for pea seed-borne mosaic virus (PSbMV) infection as a cumulative effect of PSbMV seed infection often occurs. In the case of (ii), it is recommended growers check with seed companies to ensure this test has been done on the commercial seed and if not get it done themselves.

Canopy depression and pale appearance of field pea plot sown in a HIGH RISK year with 6.5% infected seed resulting in widespread PSbMV infection
Canopy depression and pale appearance of field pea plot sown in a high risk year with 6.5% infected seed resulting in widespread PSbMV infection

A field pea plot with 0.3% infected seed resulting in vigorous growth, darker appearance with a uniform canopy
A field pea plot with 0.3% infected seed resulting in vigorous growth, darker appearance with a uniform canopy

Growers should send a 500g seed sample to DPIRD Diagnostic Laboratory Services to establish the level of PSbMV infection before sowing.

Sending samples for testing is easy. Just drop your sample into one of our pre-printed despatch bags, available on request, or address your sample to our reply paid address:

DDLS Seed Testing and Certification

Department of Primary Industries and Regional Development
Reply Paid 83377
3 Baron-Hay Court
South Perth WA 6151

Contact information

DDLS Seed Testing and Certification

Phone: +61 (0)8 9368 3721 or email: DDLS Seed Testing and Certification.

Each season, growers can be reminded to get seed tested, assess their PSbMV risk and make informed management decisions using the free SMS PSbMV risk alert service, which is available for the locations below. This risk alert service will complement the existing blackspot risk alert.

If you would like to subscribe to this service please text ‘pea virus’ to +61 (0)475 959 932 with your name and closest weather station or your locality.

Management

As well as sowing healthy seed, an integrated management approach is vital to reducing losses since insecticides are ineffective for PSbMV control.

  • Target early canopy development. Early seeding at high rates (more than 120kg/ha) and narrow row spacing (18cm) will promote an early, dense plant canopy before aphid arrival. This will help shade out the seed-infected plants that act as a source of PSbMV infection and also reduce aphid landings.
  • Retaining stubble helps decrease early virus spread by reducing aphid landing rates while bare earth between plants attracts incoming migrant aphids.
  • Avoid potential virus sources by isolating pea crops from other pulse or field pea crops sown with untested seed stocks as these could be a potential source of PSbMV.
  • Cultivar choice. If healthy seed of the agronomically best cultivar is not available, use PSbMV-resistant Wharton.

Contact information

Benjamin Congdon
+61 (0)8 9368 3499

Author

Benjamin Congdon

Funding bodies