This map shows the locations of samples which tested positive (red) or negative (blue) for Beet western yellows virus (BWYV) in NSW, SA and Victoria as of 17/09/2014 by closest town. Below is a map of West Australian research testing by the DAFWA virology group.
The Victorian Department of Environment and Primary Industries (DEPI) pathology staff and virologists have been testing canola samples with tissue blot immunoassay (TBIA) to assess plants for BWYV.
To date, 618 crop samples have been have been submitted to DEPI by agricultural consultants for virus testing and 6,007 plants have been tested for Beet western yellows virus (BWYV), Turnip mosaic virus (TuMV) and Cauliflower mosaic virus (CaMV). All plants tested were negative for TuMV and CaMV.
The overall result for BWYV testing is 57 per cent of plant samples tested were positive for BWYV. The severity or amount of BWYV in crops will be assessed using a transect survey.
SARDI and DEPI are no longer able to accept samples for testing. Growers are advised to visually assess crops for virus symptoms and aphids. See our article Beet western yellows virus in canola for further information on BWYV including symptoms and advice.