BWYV in Southern NSW

5 August 2014

Kurt Lindbeck – NSW Department of Primary Industries, Wagga WaggaJoop van Leur – NSW Department of Primary Industries, TamworthMohammad Aftab – Department of Environment and Primary Industries, Horsham Angela Freeman – Department of Environment and Primary Industries, Horsham

Outline

Seasonal summary

What have we seen this season

What have we seen in the past

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)

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Average Daily Temp – April to July

2014

2013

Temperature data for Albury with the green bands showing periods with warmer temperatures for 2014

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

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

2008 Trials

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