No-till Soybeans Emerged Without a Burndown?

You did not have an opportunity to burn down your no-till soybean fields? Read about some weed control options.
No-till Soybeans Emerged Without a Burndown? - Articles
No-till Soybeans Emerged Without a Burndown?

Messy beans

We have passed several fields where the soybeans have emerged, but the field did not receive a burndown herbicide (see accompanying photo). Weeds like dandelion, resistant marestail/horseweed, etc. will be very difficult to control postemergence in soybean. Also, many of the typical soil applied residual soybean herbicides cannot be applied over the top of soybeans because of injury concerns. Below is a list of herbicides that have foliar broadleaf activity and/or residual activity and are allowed POST along with their labeled application timings and strengths. Unfortunately, most of these herbicides will not handle dandelion, burdock, curly dock, etc. very well. This is not a comprehensive list and excludes generic products and herbicides that are mostly active on grasses and/or not typically applied POST.

  • Basagran - after emergence (general control of small annual broadleaves - good on cocklebur, lambsquaters, smartweed, and velvetleaf).
  • Blazer or Ultra Blazer - soybeans should have at least one to two trifoliate leaves (general control of small annual broadleaves - good on jimsonweed, pigweeds, nightshade, common ragweed, and smartweed).
  • Cadet - Preplant through full flowering (general control of small annual broadleaves - good on lambsquaters, nightshade, pigweeds, and velvetleaf).
  • Classic (or Synchrony) - at least one trifoliate leaf up to 60 days before maturity (general control of small annual broadleaves - good on cocklebur, jimsonweed, pigweeds, and smartweed).
  • Cobra - apply PRE or POST up to 45 days before harvest- one to two trifoliate leaves is typical (general control of small annual broadleaves - good on jimsonweed, nightshade, pigweeds, ragweeds, and smartweed).
  • FirstRate - 1st soybean trifoliate through 50% flowering (general control of small annual broadleaves - good on cocklebur, ragweeds, and velvetleaf).
  • Glyphosate (Roundup Ready only) - emergence through flowering.
  • Harmony SG - After 1st trifoliate has expanded fully and no later than 60 days before harvest (general control of small annual broadleaves - good on lambsquaters, pigweeds, smartweed, and velvetleaf).
  • Liberty (Liberty Link only) - emergence through bloom.
  • Pursuit (or Extreme with Glyphosate)- PRE to before bloom and 85 days before harvest (general control of small annual broadleaves and some grasses - good on cocklebur, pigweeds, smartweed, and velvetleaf).
  • Python - PRE and from 1st to fifth trifoliate (generally will not control emerged weeds, but provide residual control of annual broadleaves).
  • Raptor - early POST and before bloom (general control of small annual broadleaves and some grasses - good on cocklebur, lambsquaters, pigweeds, and velvetleaf).
  • Reflex or Flexstar (or Flexstar GT with glyphosate) - PRE to within 45 days of harvest (Prefix also has an early POST label) (general control of small annual broadleaves - good on jimsonweed, pigweeds, rage, smartweed, and velvetleaf).
  • Warrant - emergence to R2 (will not control emerged weeds, but provide residual control of annual grasses and some broadleaves).