Researcher(s) |
Steven Simpfendorfer (NSW DPI) |
---|---|
Year(s) | 2015 |
Contributor | Department of Primary Industries NSW |
Trial location(s) |
Coonamble, NSW
Garah, NSW Gilgandra, NSW Merriwa, NSW Mullaley, NSW North Star, NSW Nyngan, NSW Trangie, NSW Wangarbon, NSW Macalister, QLD Mungindi, QLD Westmar, QLD |
Further information | View external link |
To determine the impact of Rancona Dimension on yield loss from CR infection across sites in the northern region.
Crown rot, caused predominantly by the fungus Fusarium pseudograminearum is a significant disease of winter cereal crops in the northern NSW and southern Qld. Rancona® Dimension (ipconazole + metalaxyl) was recently registered in Australia as a fungicidal seed treatment with good activity against cereal bunts and smuts, pythium and suppression of rhizoctonia. Rancona® Dimension is also the first seed treatment to be registered (at 320 mL/100 kg seed) for the suppression of crown rot. Suppression by definition indicates that the seed treatment reduces growth of the pathogen for a set period of time early in the season. This is distinct from control which Rancona® Dimension and other seed treatments provide against bunts and smuts of wheat and barley in that they prevent infection throughout the season. It is recommended by the manufacturer that Rancona® Dimension is used as part of an integrated disease management strategy for crown rot and not as a standalone option. However, growers may still be tempted to try and use Rancona® Dimension under medium to high crown rot risk situations where other management strategies have not sufficiently reduced inoculum levels. This is not uncommon following seasons with low in-crop rainfall which limits the effectiveness of break crops such as chickpea, faba bean, canola and sorghum in decomposing cereal stubble which harbours the crown rot fungus. Under this scenario growers are often forced into sowing another winter cereal within the rotation sequence and may be tempted to resort to a seed treatment as their main option in trying to reduce yield loss associated with crown rot infection. Replicated research therefore appeared warranted to determine the impact of Rancona® Dimension on yield loss from crown rot infection across sites in the northern region. This will hopefully ensure that growers have a realistic expectation of what this seed treatment can achieve if used in isolation of other management strategies.
Key messages:
Conclusions
Rancona® Dimension is registered in Australia for the suppression of crown rot infection. Rancona® Dimension reduced establishment losses associated with severe early infection, created by the addition of crown rot inoculum to the seed furrow at sowing, to 7% compared to 26% in the absence of a seed treatment. Further research is required to determine if this improvement in establishment is associated with reduced Fusarium seedling blight. It should also be established whether such severe establishment losses are an artefact of the inoculation process used in the trials or occurs naturally in paddocks with high stubble-borne inoculum loads. In a separate larger trial conducted at Tamworth in 2015 in which infected stubble at the surface was the inoculum source Rancona® Dimension did not have a significant impact on the establishment of EGA Gregory compared to the Nil seed treatment (data not presented). Establishment benefits apparent in the 12 trials unfortunately did not translate into any improvement in grain yield. Rancona® Dimension did not provide a significant yield benefit over the use of no seed treatment or the two other commonly used seed treatments examined in this study under high crown rot pressure across 12 sites in 2015.
Although Rancona® Dimension is registered for the suppression of crown rot, with activity against early infection and potential establishment losses evident in this study, growers should not expect this to translate into a significant and consistent reduction in yield loss from crown rot infection when the product is used as a standalone management strategy. Integrated management remains the best strategy to reduce losses to crown rot. Growers may like to consider including Rancona® Dimension (320 mL/100 kg seed) as one additional component in their integrated management of crown rot.
Seed treatments evaluated:
Lead research organisation |
Department of Primary Industries NSW |
---|---|
Host research organisation | N/A |
Trial funding source | GRDC DAN00175 |
Trial funding source | DPI NSW |
Related program |
National crown rot epidemiology and management program |
Acknowledgments |
This research was undertaken as part of project DAN00175: National crown rot epidemiology and management program and is made possible by the significant contributions of growers through both trial co-operation and the support of the GRDC; the author would like to thank them for their continued support. The project is cofunded by the NSW State Government through NSW DPI which is also thanked for its support in fully funding my position, laboratory and other infrastructure costs. Technical assistance provided by Robyn Shapland, Tim O’Brien, Finn Fensbo, Patrick Mortell, Carla Lombardo, Chrystal Fensbo, Kay Warren, Karen Cassin and Rachael Bannister is gratefully acknowledged. Soil-borne pathogen levels were determined using the DNA-based soil test service PreDicta B® provided by the South Australian Research and Development Institute. We are also extremely thankful to NVT operators Peter Matthews (NSW DPI), Douglas Lush (QDAF) and Research A |
Other trial partners | Not specified |
Crop types | Cereal (Grain): Barley Cereal (Grain): Wheat |
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Treatment type(s) |
|
Trial type | |
Trial design |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | 15 May 2015 |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Inoculated versus uninoculated trial design to evaluate the relative impact of seed treatments on the yield impact associated with crown rot infection at each site. |
Seed treatment | Seed treatments evaluated: 1. Nil seed treatment 2. Rancona® Dimension (ipconazole 25 g/L + metalaxyl 20 g/L) at 320 mL/100 kg seed 3. Dividend M® (difeniconazole 92 g/L + metalaxyl-M 23 g/L) at 260 mL/100 kg seed 4. Jockey Stayer® (fluquinconazole 167 g/L) at 450 mL/100 kg seed |
Inoculant | High levels of crown rot infection induced in inoculated plots (added CR) by incorporating non-viable durum seed colonised by at least five different isolates of Fp into the seeding furrow (2.0 g/m of row) at sowing |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
Sow date | Not specified |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot randomisation | Not specified |
Seed treatment | Not specified |
Inoculant | Not specified |
Other trial notes |
Treatments
Dividend M® and Jockey Stayer® are NOT registered for the suppression of CR, but were included to represent commonly used wheat seed treatments for bunt and smut control, or early control of stripe rust (a leaf disease), respectively. Including four treatments across each site ensured statistical rigour of yield outcomes. |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.