Kurt Lindbeck, NSW DPI Wagga Wagga, discusses the seasonal conditions that led to the beet western yellows virus outbreak and describes symptoms and distribution. Talk presented at Wagga Wagga, NSW on 5 August 2014. More information at http://www.extensionaus.com.au/

1. BWYV in Southern NSW
5 August 2014
Kurt Lindbeck – NSW Department of Primary Industries, Wagga Wagga
Joop van Leur – NSW Department of Primary Industries, Tamworth
Mohammad Aftab – Department of Environment and Primary Industries,
Horsham
Angela Freeman – Department of Environment and Primary Industries,
Horsham

2. Outline
 Seasonal summary
 What have we seen this season
 What have we seen in the past

3. Seasonal summary
 Good autumn rainfalls
– High moisture
– Mild Temperatures
– Plant growth
 Early break to the season
– Canola sown on time
– Emergence (mid April – mid May)

4. 0
5
10
15
20
25
Apr-1
Apr-5
Apr-9
Apr-13
Apr-17
Apr-21
Apr-25
Apr-29
May-3
May-7
May-11
May-15
May-19
May-23
May-27
May-31
Jun-4
Jun-8
Jun-12
Jun-16
Jun-20
Jun-24
Jun-28
Jul-2
Jul-6
Jul-10
Jul-14
Jul-18
Jul-22
Jul-26
Jul-30
Average Daily Temp – April to July
2014
2013
Temperature data for Albury with the green bands showing periods with warmer temperatures for 2014

9. Current Situation
 Reports of damage in crops
– Henty to Ariah Park
 No clear pattern to level of damage
– Variety
– Sowing date
 Level of damage varies
– Large areas to small patches within crops
 Measure of yield loss will be case by case

10. Past Outbreaks of BWYV in NSW
 Widespread outbreaks in 2002
– Crop survey Moree to Cobram
– 2 – 83% incidence in crops
 Reported early outbreaks in 2008
– Some early patching in crops
– No reported yield loss

11. 2008 Trials

12. BWYV Surveys
 NVT Canola sites
– Sampled for BWYV since 2008
– Late podding
– Coincide with blackleg assessments
– 75 plants sampled per site
 Provide a snapshot of final virus levels in crops