Weeds

C.O.R.N. Newsletter Articles

  1. Cressleaf Groundsel. Source: S. Noggle, 2017
    Author(s): Sarah Noggle

    Many questions come into the County Extension Office daily.  Many times those include a question about a weed identification.  During the month of June 2018, OSU Extension will be featuring a weed identification of the week.  This week's weed is cressleaf groundsel, Senecio glabellus. 

    Issue: 2018-16
  2. Author(s): Cindy Folck

    Do you know the weather conditions that contribute to inversions? A workshop on April 10 will focus on tools to help farmers recognize inversions and other weather conditions that affect drift. Aaron Wilson, weather specialist and atmospheric scientist, will discuss weather trends and how to recognize inversions. Additionally, workshop attendees will learn about the new tools available through the Ohio Sensitive Crop Registry by Field Watch to increase communication between field crop and specialty crop growers.

    Issue: 2018-07
  3. Author(s): Mark Loux

    We have had reports of dodder in some red clover fields.  Dodder is a parasitic plant without any leaves or chlorophyll to produce its own energy.  It lives by attaching to a host with small appendages (called ‘haustoria”), and extracting the host plant’s carbohydrates. The stems are yellow-orange, stringlike, twining, smooth and branching to form dense masses in infested fields.  Although neither toxic nor unpalatable to some livestock, dodder can weaken host plants enough to reduce yield, quality, and stand.  If infestations are severe enough, dodder may kill host plants.  

    Issue: 2017-34
  4. Palmer amaranth seedhead
    Author(s): Mark Loux

    Palmer amaranth has shown up in a few more places in Ohio this summer at a range of infestation levels, and waterhemp has also become more prevalent. Newly discovered Palmer infestations in some fields were too high to be remediated by walking fields and removing plants, although there is still some potential to mow down weeds and soybeans to prevent seed production and even bigger problems next year. Infestation level in a few other fields was low enough to allow removal of Palmer amaranth plants by a crew of concerned people.

    Issue: 2017-27
  5. Author(s): Mark Loux

    One of the requirements for the registration of XtendiMAx, Engenia, and FeXapan is the investigation of any non-performance (ineffective control) by the respective companies, which then has to be reported to the USEPA.  The goal of this reporting is apparently to try to track the development of resistance as soon as it occurs in a few fields, which would then allow time to modify practices so that the rate of resistance in other fields is slowed.  We encourage growers and consultants to take the time to scout for non-performance, within 14 days after application according to information fro

    Issue: 2017-12

Publications

  1. 12/2016

    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. 

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