Take Home Messages on BWYV and GPA

Don McCaffery

NSW DPI

Orange

5 August 2014

Take home messages 2014 Carefully monitor crops for GPA presence and movement –

flights Should I spray for GPA?

– Entire crop infected with virus = NO

– Patches of crop infected with virus = MAYBE

– Uninfected crop (incl. pulses) adjacent to infected = MAYBE What we don’t know:

– Yield impact from later virus infection• Yield loss can occur from infection up to mid-pod

– But how much? Is it economic to treat?

Take home messages 2015 BWYV and GPA will be around next year

– Virus and aphid is around every year– Visual monitoring still best

• Yellow sticky traps– Need regular sampling and interpretation

– www.entosupplies.com.au

At what levels will depend on interaction between GPA (Pest) – Seasonal conditions (Environment) –Weed hosts, crop hosts (Hosts)

2014 said to be a 1 in 20 or 1 in 40 year event

Take home messages 2015 (cont’d) But higher summer rainfall and drier/warmer

autumns are the projections by climate scientists??

All seed should be treated with insecticide– Scout crops 4-5 weeks after emergence– Use sticky traps to monitor aphid numbers &

movement

Apply Transform if GPA is present and conditions conducive @ 4-5 weeks post-emergence

GPA sampling for resistance testing

GRDC FastTrack Project– Investigate infection cases to see what triggered

them– Require more GPA samples from NSW for

resistance testing– See Don McCaffery

Controlling aphids in canola

Legislation state based In NSW Pirimicarb and Transform are the ONLY

two products registered for control of aphids in canola

GPA has resistance to pirimicarb – further testing to occur in 2014

The honey bee industry are justifiably concerned– Communication is the key

2013 Survey

Last Questions