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Wild oat chemical resistance

Discussion in 'Direct Drilling Crops & Agronomy' started by kiwi, Nov 13, 2017 at 5:56 AM.

  1. kiwi

    kiwi Member

    we have developed chemical resistance to wild oats and the only option in barley is a mix of either avadex and Triflur or just avadex. We have been using the Dale seedhawk drill since 2003 and the problem being New Zealand don't have registration for granulated avadex for no or low tillage. It would be a sad day if we need to go back to minimum tillage!!
    My question is , do farmers in the u.k or Europe have wildoat resistance issues and does going to very low disturbance drills and using covercrops ,reduce the need for chemicals?
     
  2. shakerator

    shakerator Member

    Location:
    LINCS

    ALS or ACCASE or both?

    is it pinoxiden resistant too?

    no generally not the issue here
     
  3. kiwi

    kiwi Member

    Yes Pinoxaden resistant and all the chemical group A that end in fop or den. We have hopefully relief in wheat with Dow agro Rexade but seems to take two applications. Our neighbours that are minimum tillage had the trouble first and spread from there. They are getting on reasonably well with a mix of treflan and avadex but of course they burn their straw mostly. Scary when we become solely reliant on chemicals in notillage. We have a diverse range of break crops but of course Haloxyfop-p is resistant as well.
     
  4. shakerator

    shakerator Member

    Location:
    LINCS
    We have broadway star that includes pyrosulam. I am surprised you have resistance to axial
     
  5. Happy

    Happy Member

    Location:
    Scotland
    How did that happen?
    Too low rates for too long?
    Scary right enough. No resistance problems here yet but also no burning or Treflan available should it become an issue.
     
  6. Broadway Star or Atlantis for you.

    ACCase resistant oats are ten a penny here.
     
  7. Will Blackburn

    Location:
    Cheshire
    Barley?
     
  8. kiwi

    kiwi Member

    . Possibly it was from 3/4 rates being used but also the scientists believe we have what they call a slender wildoat which is slightly different to the standard wildoat.
    I have wondered if we treated them more like your Blackgrass with very low disturbance at drilling and plenty of cover , if we could reduce the germination of them?
     
    Happy likes this.
  9. Douglasmn

    Douglasmn Member

    Can't beat a rogueing gang for wild oats. Are you on too big an acreage for this to be practical?
     
  10. kiwi

    kiwi Member

    The patches of wild oats are to thick for rogueing to be practical. We have tried this but you can't get all the wild oats and damage to much of the crop. If there was just a wid oat here and there it would be practical. In hindsight we should have round upped the patches when they were smaller .
     
  11. phil

    phil Member

    Location:
    Wexford
    Do you have IPU
     
  12. Badshot

    Badshot Member

    Location:
    Kent
    Avadex is supposed to be very good for wildoats. Can be used on barley and wheat.
    Isn't there a liquid version again?
     
  13. kiwi

    kiwi Member

    We have used IPU in the past in a mixture with diflufenican to target other weeds but never knew it had suppression activity on wild oats. We did have to still spray with a specialised wild oat spray though. Thanks for the idea I will investigate some more.
    We have liquid avadex as I said but need to incorporate it here to be effective. Do you apply differently the liquid?
     
  14. Wheatseeker

    Wheatseeker Member

    IPU/Treflan pre emergence of the wild oats should work. As for Avadex the granular formula was developed after difficulties with incorporating liquid Avadex and the associated crop side effects. Its much safer even if it more difficult to apply.
    Wild oats here have largely been forgotten about due to the amount of chemistry that has been thrown at blackgrass. As most of it is pre em and has been followed with Atlantis type products that were good on wild oats, they largely disappeared. However I have noticed more spring germinating ones cropping up now that we don’t do a spring Atlantis anymore.
    Have you got Dagger? Been a while since it was available here, but it’s another chemical class.
     
  15. kiwi

    kiwi Member

    Thanks Wheat seeker. How have you got on with pre emergence sprays with lots of straw on top with notill?
    We have tried treflan but have mixed results in notillage situation, even though the seedhawk throws a bit of soil around. We could use treflan and avadex in minimum tillage situation but trying to avoid that.
    What is the chemical in Dagger? Can't seem to find it on google.
     
  16. Wheatseeker

    Wheatseeker Member

    Dagger is/was imazamethabenz-methyl.
     

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