Snapped Achilles Playing touch rugby Two weeks ago No, I am not too old!

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Presentation transcript:

Snapped Achilles Playing touch rugby Two weeks ago No, I am not too old!

Herbicide Resistance Good news and Bad news Peter Newman, AHRI

Bad news first

SusceptibleResistant Susceptible Glyphosate 450 g/ha Glyphosate 750 g/ha Glyphosate resistance in Wild Radish Mike Ashworth, AHRI

Susceptible wild radish

4.5 fold resistant 6.25 L/ha of 480g/L 9 L/ha of 480g/L 12.5 L/ha Glyphosate resistant wild radish

Label rate Population dose response Susceptible Resistant

Glyphosate resistant ryegrass Glyphosate sustainability working group led by Chris Preston

Now for the good news

Glen Riethmuller 27 year trial – stubble retained

1% / inch

15cm (6”) 30cm (12”)

Seeding Efficiency - % of seeds that emerge Seed rate kg/ha

Benefit compared to 12” 10” (25cm) 7.5” (19cm) Reduction in row spacing (cm)511 Wheat yield benefit (kg/ha)4088 $/ha benefit$10.80$23.76

Cost compared to 12” 10” (25cm)7.5” (19cm) Extra cost of bar (John Deere)$13,000$24,000

Cost compared to 12” 10” (25cm)7.5” (19cm) Extra cost of bar (John Deere)$13,000$24,000 Cost /ha/yr (8yr 2000ha)$0.81$1.50

Cost compared to 12” 10” (25cm)7.5” (19cm) Extra cost of bar (John Deere)$13,000$24,000 Cost /ha/yr (8yr 2000ha)$0.81$1.50 Extra fuel ($/ha) – worst case$1.20$3.50

Cost compared to 12” 10” (25cm)7.5” (19cm) Extra cost of bar (John Deere)$13,000$24,000 Cost /ha/yr (8yr 2000ha)$0.81$1.50 Extra fuel ($/ha)$1.20$3.50 Delayed sowing cost ($/ha)0$5.56

Cost compared to 12” 10” (25cm)7.5” (19cm) Extra cost of bar (John Deere)$13,000$24,000 Cost /ha/yr (8yr 2000ha)$0.81$1.50 Extra fuel ($/ha)$1.20$3.50 Delayed sowing cost ($/ha)0$5.56 Total extra cost /ha$2.01$10.56

Scoreboard 10”7.5” Cost$2.01$10.56 Benefit$10.80$23.76 Net Benefit $/ha$8.79$13.20 Wheat only – 2 t/ha. 8 kg/ha/cm

Crop Orientation 50% reduction in ryegrass seed set for free Catherine Borger Department of Agriculture and Food WA

East-west North-south

James Buttle

650 hours

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