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South Stirlings

Miravis Star Canola foliar fungicide

By South Stirlings

Objectives

  1. Evaluate Syngenta’s new foliar fungicide in canola, for the control of Sclerotinia.
  2. Compare and contrast with existing chemicals on the market.

Background

The trial was sown on the 25th of May in the South Stirlings region. A dry start to the season lead to a decile 1 year for disease and no Sclerotinia was detected at the site during the season.

PRE SEEDING

Early Knockdown -17/4/2020: Glyphosate 450 1.5L/ha, Oxyflurofen 240 EC 60ml/ha, Hammer 400 EC 15ml/ha, Kamba 750 200ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Pre seeding knockdown- 27/4/2020: Glyphosate 450 1L/ha, Goal 60ml/ha, Hammer 400 EC 15ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Immediately pre seeding – 25/5/2020: Glyphosate 450 1.5L/ha, Oxyflurofen 240 EC 60ml/ha, Hammer 400 EC 15ml/ha, Kamba 750 200ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Early Nitrogen Application- 25/5/2020: 80L/ha Flexi-N.

SEEDING

Seeding – 25/5/2020: Bonito Canola 3kg/ha, Double Phos 132kg/ha, Sulphate of potash 50kg/ha.

POST EMERGENT

Nitrogen Top-up- 24/6/2020: 80L/ha Flexi-N.

Treatment Sprays – 24/8/2020: as per treatment list.

Results

Yield (t/ha)

Photos

 

15 Days Post Spray

Control

Miravis Star 750ml/ha

Miravis star 1000ml/ha

Aviator Xpro 750ml/ha

Veritas 1000ml/ha

Prosaro 450ml/ha

Key Findings

  • No visible evidence of Sclerotinia, however Blackleg ( Leptosphaeria maculans) was visible throughout the trial.
  •  No significant yield difference between treatments although all treated plots had numerically higher yields than the control. This could be due to the presence of Blackleg causing a slight yield decrease in the untreated control.
  • No crop damage from any of the treatments.

ILeVo Blackleg seedling control in canola

By South Stirlings

Objective

To demonstrate BASF’s new canola blackleg seedling treatment, against existing treatments on the market.

Background

Blackleg, caused by the fungus Leptosphaeria maculans is one of the most serious diseases of canola in Western Australia. This trial was sown on the 25th of May, at a site with previous history of Blackleg, in the South Stirling region. A dry start to the season correlated to a decile 1 year for disease. The area finished with a GSR of 400ml with the first major rainfall event in August.

PRE SEEDING

Early Knockdown -17/4/2020: Glyphosate 450 1.5L/ha, Oxyflurofen 240 EC 60ml/ha, Hammer 400 EC 15ml/ha, Kamba 750 200ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Pre seeding knockdown- 27/4/2020: Glyphosate 450 1L/ha, Goal 60ml/ha, Hammer 400 EC 15ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Immediately pre seeding – 25/5/2020: Glyphosate 450 1.5L/ha, Oxyflurofen 240 EC 60ml/ha, Hammer 400 EC 15ml/ha, Kamba 750 200ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Early Nitrogen Application- 25/5/2020: 80L/ha Flexi-N

SEEDING

Seeding – 25/5/2020: Bonito Canola 3kg/ha, Double Phos 132kg/ha, Sulphate of potash 50kg/ha.

POST EMERGENT

Nitrogen Top-up- 24/6/2020: 80L/ha Flexi-N

Results

Emergence Counts

Yield

Disease severity at two leaf crop stage

Internal infection at windrowing

Emergence photos

Maxim XL

Saltro Duo + Maxim XL

Control blackleg infection

Key Findings

  • Decile 1 year for disease meant that there was low disease pressure.
  • No blackleg at 2 leaf crop stage and in the upper canopy throughout crop growth.
  • Significant difference between treatments for internal infection at windrowing, with the Ilevo treatment reducing internal infection by 50% compared with the control, but was slightly less effective than Maxim XL and Saltro Duo.
  • No significant yield differences between treatments, however, Ilevo treated plots yielded the highest by 100kg/ha.

Barley Fungal Systems

By Fungicides 2020, South Stirlings

Objectives

  1. Highlight the “do’s and don’ts” of fungicide use in barley.
  2. Demonstrate effective MOA rotations and mixes.
  3. Demonstrate effective seed treatments, Z32 foliar applications and Flag leaf applications.

Background

The trial was sown on the 25th of May in the South Stirlings region on a paddock that rotates barley and canola. In-furrow treatments were applied using a split boot system and the seeding depth was 20-30mm. A dry start to the season led to a decile one for disease in 2020. Low pressure combined with stressful crop conditions were not conducive for a fungal environment.

PRE SEEDING

Pre-seeding Knockdown – 5/5/2020: Glyphosate 1L/ha, Goal 60ml/ha, Hammer 400EC 15ml/ha, Wetter1000 0.2%, Ammonium Sulphate Herbicide Adjuvant.

Nitrogen- 15/5/2020: Flexi N 80L/ha.

Immediately Pre seeding – 15/5/2020: Paraquat 1L/ha, Treflan 2L/ha, Metribuzin 750WG 125g/ha, Conquest Alpha Forte 250 SC 40ml/ha.

Seed and In-furrow treatments 15/5/2020: As per trial design.

SEEDING 

Seeding- 15/5/2020: Barley RGT Planet 64kg/ha, Double Phos 132kg/ha, Sulphate of Potash 50kg/ha.

POST SEEDING 

Nitrogen Top-up- 24/6/2020 – Flexi N 80L/ha.

Z32 Application Sprays – 13/8/2020: As per design.

Z32 Bumper Spray – 17/8/2020: As per design.

Flag Leaf Application Sprays – 4/9/2020: As per design.

Results

Dots on the graphs represent data points from each replicate.

10 days post flag leaf sprays

Leaf infection rating (1-10) 20 WAS

Return on Investment and Yield

Photos

12WAS

20WAS

Control vs Bumper fb Bumper

Control vs Z31 Radial

Control vs Flagleaf Radial

Control vs Topnotch fb Radial

Control vs Flagleaf Aviator xpro

Control vs Topnotch fb Aviator Xpro

Control vs SD Systiva

Control vs Systiva fb Z31Radial

Control vs Systiva fb Flagleaf Radial

Control vs SD Systiva fb Topnotch  fb Radial

Control vs SD Systiva fb Topnotch fb Aviator Xpro

Control vs IF Uniform +  Vibrance

Control vs IF Uniform + Vibrance fb Radial

Control vs IF Uniform + Vibrance fb Flagleaf Radial

Control vs IF Uniform + Vibrance fb Topnotch fb Radial

Control vs IF Uniform + Vibrance fb Topnotch fb Aviator Xpro

Key Findings

  • A decile 1 year for disease resulted in no significant difference between treatments with respect to yield, however, there were numerical differences.
  • Conical snail damage late September, snails moving up the canopy and feeding on the upper leaves – were inverting the green leaf retention results.
  • SD Systiva 150ml/100kg fb Z31 Radial 600ml/ha was the most effective treatment, reducing infection of FL-2 by 18% compared to the control. However, this was not significantly different to most of the treatments (including the control) due to low disease pressure.
  • Z31 Topnotch 400ml/ha with SD Systiva fb FL Radial and Z31 Topnotch 400ml/ha with SD Systiva fb FL Aviator X-Pro reduced disease by 16% and 17% respectively compared to the control.
  • Level of disease pressure must be taken into account when deciding whether to use fungicides
  • This trial indicates the benefits of well-timed treatments. Be it seed treatment with a follow up spray or a Z31 foliar spray followed by a Flag leaf foliar spray.
  • Crops are generally considered at risk of yield loss when SFNB is easily found on all plants and the infection affects more than 10 per cent of the leaf area. Rainfall during late winter and spring favours SFNB infection and will increase potential losses. Therefore, the 2020 season is a prime example of when not to spray, in order to gain the most economic value from your crop and your system.
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