Weeds

C.O.R.N. Newsletter Articles

  1. Author(s): Mark Loux

    Based on the current price of wheat, some wheat fields with less than ideal stands are being taken to yield instead of terminated.  A uniform wheat stand usually provides most of the weed control that’s needed.  Weeds will likely be more evident and in need of control where stands are thin or erratic.  We have been told wheat herbicides are scarce, so growers might want to check with suppliers soon.  Reminder that any product containing dicamba has to be applied prior to jointing. 

    Issue: 2022-07
  2. Author(s): John Barker , Author(s): Mark Loux , Author(s): Tony Nye

    Are you concerned about the effectiveness of your herbicide program?  Want to sharpen your weed id skills?  Not sure which nozzles provide the best control options?  Is herbicide resistance REALLY that big of a problem?  These topics and many more will be discussed at the 2022 Ohio Weed University.

    Issue: 2022-01
  3. Author(s): Mark Loux

    It can be nice to see old friends.  Except when they cause crop and yield loss, refuse to leave after a few days, and don’t respond to chemicals.  A while back we wrote about what appeared to be an increase in populations of dandelions and other winter weeds and made some guesses about why this was happening.  Canada thistle has once again become a problem in some fields in a big way, probably for some of the same reaso

    Issue: 2021-19
  4. Poison hemlock (Conium maculatum L.) and wild parsnip (Pastinaca sativa L.) are combined in this report because these invasive non-native weeds are increasingly found growing together in Ohio.  However, the defense chemicals of these weeds are very different and have vastly different modes of action.  This is important to understand relative to management options as well as medical treatments for exposure to these highly dangerous weeds.
    Author(s): Mark Loux , Author(s): Ted Wiseman , Author(s): Allen Gahler

    Wild Parsnip FlowersPoison hemlock seems to be on everyone’s radar more than usual this year, especially in northern Ohio.  We know that while hemlock has been all over southern Ohio for years, it is continuing to spread northward, where new occurrences and observations of it may be engendering concern in the general public and local government. There have also been comments that it seems “worse than usual” this year in

    Issue: 2021-19
  5. Author(s): Richard Purdin , Author(s): Taylor Dill , Author(s): Les Ober, CCA

    Roughstalk BluegrassThere is a new and emerging weed challenging cereal grain and forage producers across the state. Roughstalk Bluegrass has taken root in wheat fields and newly established forage stands. This weed has reached population levels high enough to inhibit the harvest of cereal grains, reduce the quality of forages, and crowd out newly established forages.

    What is it?

    Issue: 2021-18

Publications

  1. 12/2020

    Ohio, Indiana and Illinois Weed Control Guide, Bulletin 789. Publication gives detailed guidance on weed control selections. Numerous tables by crop and application help producers select the best product option for their weed control situation. Hard copy and PDF available for purchase

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