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Morningglory: A Tangled Mess

November 24, 2018
This agronomic image shows morningglory growing up corn.

Cuba City, WI, 2018: Morningglory grows up corn plants.

Morningglory does not always receive as much attention as giant ragweed, marestail, Palmer amaranth or waterhemp, but it is a difficult-to-control weed nonetheless. It presents several serious issues:

  • Like other tough weeds, morningglory is a yield robber
  • Early-season competition from morningglory and other weeds fundamentally alters the way corn grows – an irreversible change that negatively impacts yield from the start
  • Its seeds can remain viable in the soil for up to 50 years, meaning plants that go to seed leave a lasting, and costly, legacy
  • Each morningglory plant can produce 5,000-15,000 seeds
  • Left uncontrolled, morningglory crawls up and over corn plants, leaving a tangled mess that can slow combines at harvest

Avoid having a tangled mess in your fields, now and in the future, by being proactive about weed control. To start clean and stay clean in 2019, we recommend Acuron® or Acuron Flexi corn herbicide. Acuron has 4 active ingredients and 3 effective sites of action (Groups 5, 15, and 27), and Acuron Flexi, its atrazine-free counterpart, has 3 active ingredients and 2 effective sites of action (Groups 15 and 27). Both contain the active ingredient bicyclopyrone, which complements the other active ingredients to deliver more effective and more consistent control than competitive products – especially on large-seeded broadleaf weeds like morningglory and giant ragweed. For optimal control, these brands should be applied in a 2-pass system. In a 2-pass system, a pre-emergence foundation rate of Acuron or Acuron Flexi can also be followed by a post-emergence application of Halex® GT herbicide plus either an atrazine or dicamba product. Applying Halex GT post-emergence adds an additional site of action (Groups 9, 15 and 27).

This agronomic image shows clean corn rows after using Acuron herbicide.

Mount Horeb, WI, 2018: Acuron Flexi 102 days after application.

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All photos are either the property of Syngenta or are used with permission.