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Research Updates
- Article Date
- 29.04.2013
- GRDC Project Code
- WAN00020
- Presented At
- 2013 WA Agribusiness Crop Updates
KEY MESSAGES
• Farmer’s perceive that dry sowing can improve overall farm productivity
• The proportion of wheat dry sown within a farm is 40% in the low rainfall zone compared with 26% and 23% in the medium and high rainfall zones.
• When growers dry sow they are most concerned about weed control, poor emergence and the risk of frost.
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Research Updates
- Article Date
- 29.04.2013
- Presented At
- 2013 WA Agribusiness Crop Updates
KEY MESSAGES
In 2012 two insecticides, each representing a new mode of action, were approved for use against diamondback moth (DBM) in canola. While DBM has been difficult to control with older organophosphates and synthetic pyrethroids, spinetoram (Success™ NEO from Dow AgroSciences) and emamectin benzoate (Affirm® from Syngenta) are highly effective and with careful management will continue to provide canola growers with cost-effective DBM control for many years.
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Research Updates
- Article Date
- 29.04.2013
- Presented At
- 2013 WA Agribusiness Crop Updates
KEY MESSAGES
Four trials commissioned by Dow AgroSciences studied the efficacy of TransformTM on three species of aphids attacking canola in Western Australia (WA). These data shows that Transform is effective on damaging populations of aphids in canola at rates between 100 – 200 mL/ha. Transform contains a brand new insecticide and will be a valuable tool for canola growers with anticipated registration in mid 2013.
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Research Updates
- Article Date
- 02.04.2013
- GRDC Project Code
- DAW00207
- Presented At
- 2013 WA Agribusiness Crop Updates
KEY MESSAGES
• Average yield loss from YS-SNB disease complex in wheat over thirty years of DAFWA’s field trials in WA was 11.5% equating to 302 kg/ha or $75 /ha. Yield effects in individual experiments ranged from -300 to 1760 kg/ha.
• The higher rainfall zone suffers greater yield losses from YS-SNB disease complex than medium and low rainfall zones.
• Application of one fungicide spray can recover some of this loss to provide economic returns (break even yield ~ 60 kg/ha) in high and medium rainfall zones, but is unlikely to be economic in the low rainfall zone.
• Differences in response to fungicide product (tebuconazole, propiconazole or newer products) were not clearly evident in yield response, whereas higher rates, regardless of fungicide, significantly increased yield response in the high rainfall zone.
• A significant yield response was evident when disease level was at least 10% leaf area affected on the second top leaf at the time of spray.
• The more rain-days (having at least 2 mm per day) the crop received in the 10-day period after spraying, the greater the yield response.
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Research Updates
- Article Date
- 02.04.2013
- GRDC Project Code
- CSP00127, CSP00128, LIE00006
- Presented At
- 2013 WA Agribusiness Crop Updates
KEY MESSAGES
• Summer rainfall in excess of 25-30 mm in a single event is usually stored in the subsoil, so a rainfall event of 100 mm would leave about 70 mm in the soil. Rainfall events smaller than 25 mm are generally completely evaporated prior to sowing. Later rainfall is more beneficial, particularly on heavier soils.
• Summer weeds are effective in scavenging soil water and nitrogen.
• Residue management has little impact on stored soil water at sowing.
• Increased soil water at sowing may lead to higher yields, particularly in soils with higher soil water holding capacity, or in dry growing seasons.
• Summer weed control is necessary in about 40% of years in the Northern Agriculture Region, and 60% of years on the south coast, and on average gives a positive economic return.
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Research Updates
- Article Date
- 27.03.2013
- Presented At
- 2013 WA Agribusiness Crop Updates; 2013 Victorian GRDC Grains Research Update for Advisers
- Region
- West, South
AIMS:
A submission has been made to the APVMA for registration of Roundup Attack with IQ inside used pre-harvest in canola – a new use pattern for Australian canola growers.
Trials demonstrate good levels of annual ryegrass seed set control – providing growers with another tool for weed seed management.
Application can be made over the top of standing canola (prior to direct harvest) or applied under the windrower/swather with specialized spray equipment.
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Research Updates
- Article Date
- 27.03.2013
- GRDC Project Code
- FGI00007
- Presented At
- 2013 WA Agribusiness Crop Updates
KEY MESSAGES
Grazing of cereal and canola crops in winter reduced grain yield by between 8 and 21% at seven of eleven sites. Grain yield was unaffected by grazing at four of eleven sites.
Late and/or heavy grazing of a crop increases the risk of incurring a yield penalty. Low rainfall may also be a factor.
Grazing needs to be carefully managed when grazing crops to avoid costly yield penalties in years (such as 2012) when grain prices are high.
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Research Updates
- Article Date
- 27.03.2013
- GRDC Project Code
- DAW00204
- Presented At
- 2013 WA Agribusiness Crop Updates
KEY MESSAGES
• Growers are tending to adopt a combination of short-term mitigation and long-term amelioration management options for managing water repellent soils both of which can improve crop establishment and productivity.
• Wetting agents, paired row seeding and other mitigation options can improve whole farm income because they are used over the whole seeding program. Amelioration options such as spading or mouldboard ploughing often give greater and longer-lasting yield increases and are profitable but are slow and costly to implement.
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Research Updates
- Article Date
- 27.03.2013
- GRDC Project Code
- DAW00204
- Presented At
- 2013 WA Agribusiness Crop Updates
Key messages
• Nitrogen derived from soil organic matter was most available in mouldboard treatments.
• Moderately water repellent soil has reduced soil nutrient availability though has not had a negative impact on crop establishment.
• Mouldboard ploughing and rotary spading have had a major effect on root distribution in the 2nd year after tillage.
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Research Updates
- Article Date
- 27.03.2013
- Presented At
- 2013 WA Agribusiness Crop Updates
KEY MESSAGES
• Moddus Evo reduces lodging and can increase yields
• Application timing and concentration of Moddus Evo is critical
• Moddus Evo should not be applied to plants under stress
• Moddus Evo has improved formulation stability and plant uptake