S POWLES INFO

Ryegrass Surveys up to 2005-2009

2008

2007

2005/ 2010

2006

2009

2009

Have covered all survey areasRepeating on 5 year intervals

Survey area 250,000 km-2

South AustraliaNew South Wales

Victoria

Random Ryegrass Survey Results by Adelaide Uni and Charles Sturt Uni

NSW & Tasmanian results courtesy of John Broster (Charles Sturt Uni, Wagga Wagga)

25 7340 33 32 52010

P. Boutsalis, C. Preston & G. GillData is percentage of samples with survival ≥20% survival in university pot trials .

HERBICIDE Vic- Mallee(2010)

Vic- North(2006)

SA- Mallee/SE

(2007)

SAEyre Pen

SA- Mid north(2008)

Nr of samples 60 11 57 71 51

Verdict or Targa

7 0 0 0 2

Select 5 0 0 0 0

Atlantis 0 0 0 0 2

Midas - - 0 0 -

Metribuzin - - 0 0 -

Brome

% of paddocks with herbicide resistant brome (≥ 20% survival)(data is % of random samples)

HERBICIDE VictoriaWestern(2005)

VictoriaNorthern

(2006)

SAMid-North

(2008)

SAEyre-Penin

(2009)

WA(AG zone)

(2005)

Fields with wild oats 35/ 112 96/ 118 95/270 64/177 150/ 678

Hoegrass 17 8 ≥9 ≥2 16

Topik/Wildcat - - 9 2 -

Verdict - - 4 2 -

Axial/ Achieve - 2 6 2 2

Mataven - - 14 0 -

Atlantis - - 0 0 -

WA data from Owen & Powles, 2007SA Mallee 2007 survey: only 4 wild oat samples collected

Wild Oats