Rice Extension Newsletter November 2017

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Welcome to the November Rice Extension Newsletter. 

In this month's newsletter:

  • Demonstrating new herbicides in your local area
  • Herbicide resistance – be aware
  • Do's and Dont's when using Group A herbicides in rice
  • Re-sowing options in C2018
  • Russian Wheat Aphids – please report any damage
  • MapRice GIS crop survey competition
  • Troy has a new office location
  • Women in Rice - register
  • Innovators Workshop - register

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Twitter post shows large numbers of weeds present in the untreated plots compared to the plots treated with Gramoxone/Magister and Stomp in the new herbicide demo. These weeds will really test the new herbicide which will be sprayed prior to permanent water.

A new Group I herbicide is planned for release by Dow Agrosciences over the next two years. The herbicide controls broadleaf weeds, barnyard grass, silvertop grass and suppresses dirty Dora. Ubeniq™ with the active ingredient Rinskor™ Active will be for use in aerial sown rice and is expected to be released in 2019. Agixa™ herbicide with Rinskor™ active will be for use in drill sown rice and it is a mix of Rinskor™ Active and Cyhalofop and is expected to be released in 2020.

Rice Extension have teamed up with Malcolm Taylor, Agropraisals, Dow Agrosciences, growers and local agronomists across the rice growing area to demonstrate the current and the new herbicide treatments in drill sown rice. There are sites at Widgelli, Coleambally, Moulamein, Koonoomoo, Jerilderie and Finley. Dow AgroSciences has also set up commercial sized aerial sown trials in the Murray Valley to assess Ubeniq™. Treatments in regional drill sown herbicide demonstration sites:

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Watch out for herbicide applications that appear to be ineffective. If plants survive the application of a herbicide that would kill a normal population of the same species, please call Rice Extension or talk to your agronomist. We can send a sample of these weeds for resistance testing.

Herbicide resistance is a threat to the rice industry. In other countries, herbicide resistance has developed with many of the herbicides that we use.

Good practices, such as using a combination of different modes of action and having good crop rotations, has helped to prevent resistance to many of our chemicals. Stay vigilant and keep an eye on weed populations. If weeds become resistant, we need to know as soon as possible to create a plan to deal with the problem.

There is some great information here from the Australian Herbicide Resistance Initiative https://ahri.uwa.edu.au/

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Good weed management always begins with a foundation treatment. When a secondary control of grass weeds is required, we are relying on a Group A mode of action. Group A’s are high risk for resistance management according to Croplife Australia.

So it is important from a herbicide resistance and economic perspective that we use these herbicides- Aura® and Barnstorm™ correctly.

To find out more on the Do’s and Don’ts for using Aura® and Barnstorm™ for control of Barnyard Grass (BYG) and Silver Top grass read here.

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The rice crops pictured above have the same yield potential even though the plant population varies greatly. Neither of these crops would need re-sowing. 

Results from research on rice plant populations will make it easier to make that tough re-sowing decision. Brian Dunn and his team at NSW DPI demonstrated that in over 800 sites tested, plant populations as low as 40 plants/m2 achieved similar yields to higher plant populations of 100 to 300 plants/m2.. Read about the details in NSW DPI Rice plant population guidelines.

If you do make the decision to re-sow it would be worth considering using the short season varieties YRM70 and YRK5. They offer some flexibility and should be considered on a case by case basis in consultation with your agronomist and the Sunrice Grower Services field staff. Timing of maturity, potential loss of variety premium and contract conditions will need to be considered.

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John Fowler Extension Agronomist, Murray Local Land Services

Every drill sown rice crop I have visited in the last two weeks has had an infestation of RWA, varying from minor levels to extremely heavy infestations.  We know very little about RWA impact on rice but the following are my observations.

Damage: The majority of crops did not require spraying, in my opinion, as they seemed to be handling the aphid pressure and had good levels of aphid predators (such as lady beetles).  However, several crops were being adversely affected and required spraying.  It appears that crops most vulnerable are those that already had some other significant stress, usually Magister herbicide damage. These crops were not handling the dual stress of the herbicide damage and the aphids.

Insecticide: At this stage, the only registered insecticide is chlorpyrifos (e.g. Lorsban) at up to 900 ml/ha.  Don't use other chemicals as they are either ineffective or are not registered for use on rice crops.  Lorsban is quite harmful to all insects, including the beneficial insects, so only spray if the crop really needs it.

Hot Weather:  Observations are that aphid number and activity has declined markedly with the onset of the hotter weather this week.

Please be aware Rice Extension and NSWDPI are closely monitoring the situation and will report any new findings. If you have any questions or to report any damage, please contact Mark Stevens, Entomologist at NSWDPI: 0477 047216 mark.stevens@dpi.nsw.gov.au

Malcolm Taylor says to prevent damage to rice when spraying propinal(Stam): “Chlorpyrifos should not be tank mixed with propanil, nor should it be sprayed within about a week of propanil application as propanil tolerance by rice can be seriously compromised.”

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Enter your planting details for a chance to win one of 3 prizes: a John Deere Gator, Phantom IV Drone, Engel car fridge – Closes 11 December, Drawn 20 December in time for Christmas.

Download the Agtrix Farming App from your App Store, or login to SunRice Grower Services at: https://www.sunrice.com.au/corporate/grower-services/ then click on the MapRice GIS tab.

For help in filling out your planting details contact Grower Services on 1800 654 557

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The Murray Valley Rice Extension Officer has moved offices.

You can now contact Troy Mauger at
The End Street Business Centre, 3/125 End St, Deniliquin.
Same phone number 0417375168

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Deniliquin Golf Club
27th November 2017 – 9.30am to 1.30pm

Register at https://womeninrice2.eventbrite.com.au

Free information and networking event:

Question time: balancing dual roles with Anna Jewell, SunRice Grower Services

Initiating difficult conversations: Lyn Sykes, communication consultant and author of A Guide to Communication for Farm Families

A virtual farm tour: discussing rice, mixed farming and business with Diane Morona, local farmer 

Lunch will be included and children are welcome.

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9am – 5.30 pm

Murrumbidgee Irrigation Ltd, Research Station Rd, Hanwood (near Griffith)

Free information & networking event featuring:
Farm walks with growers in Bilbul area near Griffith:

  • Growing rice after cotton: management tips
  • Delaying permanent water: why do it & how is it managed?
  • Clever Rice farming: growing Doongara for best yields
  • Precision spreading: calibration & section control with Russell Nichol

Leadership training programs Rachel Kelly, Ricegrowers’ Association
Nutrients & ameliorants: why apply sulphur, potassium, lime, gypsum, phosphorus or zinc Jim Laycock, Incitec Pivot

Value adding to the rice pool: SunRice products
Everything you need to know about panicle initiation

Register by Monday 11th December and for more information contact Leah Garnett, Rice Extension on 0455 558 035 or at lgarnett@rga.org.au

Register at innovators6.eventbrite.com.au

Rice Extension: connecting growers with research, technology and best practice

Troy Mauger (Murray) 0417 375 168 tmauger@rga.org.au
Leah Garnett (Murrumbidgee) 0455 558 035 lgarnett@rga.org.au
Gae Plunkett (Rice Extension Coordinator) 0419 790 019 gplunkett@rga.org.au

Copyright © 2017 Rice Extension, All rights reserved.