Grains Research and Development

AHRI Newsletter

AHRI insight is available as a regular email service providing up to date research information and news from the Australian Herbicide Resistance Initiative (AHRI). To subscribe, email subscribers@grdc.com.au with the subject "Subscribe AHRI insight".

  • AHRI insight 72 Low Dose Phenoxy Resistance

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    18.10.2016
    Region
    West, National

    Once upon a time we used to argue about whether smoking was bad for your health. We don’t argue about that anymore.

    In the world of weeds, we used to argue whether low herbicide rates cause herbicide resistance. We don’t argue about this anymore. Both low rates and high rates of herbicide can cause herbicide resistance, but it seems that low rates are the fast track to herbicide resistance.

    Dr Mike Ashworth from AHRI, evolved resistance to 2,4-D in wild radish. Mike started with only a few hundred plants of a known herbicide susceptible wild radish population, and in just four generations of recurrent selection with low doses, quickly evolved 8.6 fold resistance to 2,4-D.

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    AHRIinsight72pdf
  • AHRI insight 70 Narrow Row Spacing

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    25.08.2016
    Region
    West, National

    It would be really nice if research told us that fast food, chocolate and lollies were better for us than a balanced diet. We could eat what we want without a care in the world. There are those who believe that junk food is good for you, but the science doesn’t support this belief.

    It would also be nice if research told us that wide row spacing increased grain yield while improving weed control. Wide row spacing is cheap and convenient. Fewer tines or discs to pull, easier stubble handling, good herbicide safety, less fuel and horsepower required, cheaper machinery, the list goes on…

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    AHRIinsight70pdf
  • AHRI insight 69 Warm Water

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    05.08.2016
    Region
    West, National

    Some things in life are best served warm.

    It’s just the way it is. The evening meal, toast, custard, hollandaise sauce, herbicide spray water…

    New research by Devkota and colleagues from Purdue University in the USA tells us that cold water may not be as good as warm water when spraying weeds.

    They found that when they sprayed giant ragweed and morningglory with a glyphosate + dicamba mix, weed control was improved anywhere from 6% to 26% by using spray water that was 18°C to 39°C compared to 5°C.

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    AHRIinsight69pdf
  • AHRI insight 68 Wild Oat Resistance

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    25.07.2016
    Region
    West, National

    Many young people don't like the taste of beer, but they know if they work hard, endure the awful bitter taste and hideous hangovers for a few years, they will eventually like the stuff. It takes effort, but if they stick at it long enough they can get there.

    And, believe it or not, you have to work pretty hard to evolve resistance in wild oats. But if you stick at the same practice long enough (it takes effort), you can get there!

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    AHRIinsight68pdf
  • AHRI insight 67 Stay Native To The Communication Platform

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    01.07.2016
    Region
    West, National

    Stay native to the (communication) platform

    You can’t have your cake and eat it.

    But what’s the point of cake if you don’t eat it?

    Ok, we’ve (deliberately) misinterpreted the saying here, but you get the drift.

    What's the point of doing research if you don’t tell anyone about it?

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    AHRIinsight67pdf
  • AHRI insight 66 Clean Seed Most Improved

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    15.06.2016
    Region
    West, National

    Clean Seed - Most Improved

    Grain growers in WA get the most improved award for seed cleaning this year. A study by AHRI researcher Mechelle Owen in 2015 found that 41% of grower seed samples were completely weed free compared to 27% when the survey was first conducted in 2008. Gold star to these growers!

    The 2008 study concluded that seed cleaning professionals were better than grain growers at cleaning seed.

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    AHRIinsight66pdf
  • AHRI insight 65 Harvest Weed Seed Control in the North

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    26.05.2016
    Region
    West, National

    Harvest Weed Seed Control in the North (it's possible)

    Two English shoe salesmen were sent to Africa in the late 1800’s to see if there was a market for their product.

    The first salesman reported back, “Situation hopeless, no-one wears shoes, returning home immediately.”

    The second salesman reported back, “Glorious opportunity, no-one wears shoes.”

    Salesman two is the real entrepreneur, the person who sees opportunity where others do not.

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    AHRIinsight65pdf
  • AHRI insight 64 How stuff works

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    04.05.2016
    Region
    West, National

    How stuff works: 2,4-D, free radicals, and monkeys

    It’s pretty amazing that 2,4-D is our oldest herbicide, yet scientists have only just worked out how it actually kills weeds. This has taken years of research by many researchers to understand.

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    AHRIinsight64pdf
  • AHRI insight 63 24 D Gridlock

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    12.04.2016
    Region
    West, National

    Picture yourself as a city slicker driving to work. Between your house and the freeway there are four sets of traffic lights.

    On this particular day all of the traffic lights are stuck on red. The city is in chaos with no-one able to get to work. You then spend the rest of your life, in your car, at a red traffic light.

    Perish the thought!

    This is how 2,4-D resistance works in wild radish.

    The traffic lights are transporters that allow 2,4-D to move from cell to cell, and the freeway is the phloem –the plant veins that move sugars and other products around the plant.

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    AHRIinsight63pdf
  • AHRI insight 62 America big weeds big resistance big problem

    Newsletters

    Australian Herbicide Resistance Initiative (AHRI) logo

    Date
    29.03.2016
    Region
    West, National

    Everything is bigger in America (go big or go home).

    Cars, food, supermarkets, houses (McMansions), weeds…American weeds are huge. Weeds like tall waterhemp and Palmer pigweed grow 2 to 3 metres tall (six to ten feet in “American”) and can have seed set of up to 1 million seeds per plant.

    And these aren’t even the big ones.

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    AHRIinsight62pdf