WEED OF THE MONTH: Morningglory

  • morninggloryVarious types: Ivyleaf, and tall or common morningglory1
  • Scientific name: Ipomoea hederacea and Ipomoea purpurea1
  • Grass or broadleaf: Broadleaf1
  • Found in every state except Idaho: AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, HI, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY2
  • Germination timing:
    • According to Joe Armstrong, field scientist, Dow AgroSciences, morningglory germinates later than most common weeds such as giant ragweed and lambsquarters.
    • Morningglory species usually germinate in late spring/early summer. Most seedlings emerge following rain or irrigation, but they also may appear when surface soil is too dry for other annuals to emerge. Seeds germinate down to a depth of 4 inches or more.3 
  • Competitiveness: Morningglory is a low-climbing vine that twines up neighboring crop plants for support and has varying effects on crop yields, depending on limiting resources such as light, nutrients and water.4 Ivyleaf morningglory has a trailing or climbing annual vine up to 6 feet or taller.1 Tall morningglory can grow up to 12 to 15 feet tall at maturity.5 

Trends:

According to Armstrong:

  • Most fields will see a blend of morningglory species. Tall and ivyleaf morningglory are the most commonly found morningglory species in Midwest fields. The species are similarly managed.

Resistance:

  • There are no documented cases of herbicide resistance.

Weed Management tips:

According to Armstrong:

  • Scout fields for morningglory after soybeans and corn are planted. Morningglory cotyledons, or the first leaves to emerge, have a distinct butterfly shape, making them easy to spot as young plants. Control it early, as it can quickly spread through fields.
  • Soil-applied products such as SureStart® II herbicide, FulTime® NXT herbicide, Keystone® NXT herbicide or Keystone® LA NXT herbicide provide outstanding preemergence control in corn fields.
  • Sonic® herbicide and Surveil™ Co-pack herbicide provide effective preemergence control in soybean fields.
  • In soybean fields, FirstRate® herbicide as a tank-mix partner provides postemergence control of morningglory. Durango® DMA® herbicide offers powerful postemergence control in corn.

Dow AgroSciences weed control solutions:

Corn:
SureStart® II herbicide
Keystone® NXT herbicide
Keystone® LA NXT herbicide
FulTime® NXT herbicide
Surpass® NXT herbicide
Hornet® WDG herbicide
Durango® DMA® herbicide
Duramax® herbicide
Enlist™ Weed Control System,* when commercialized

Soybean:
Sonic® herbicide
Surveil™ Co-pack herbicide
FirstRate® herbicide
Python® WDG herbicide
Duramax® herbicide
Durango® DMA® herbicide
Enlist™ Weed Control System,* when commercialized

*Regulatory approvals are pending for the Enlist herbicide solution and crops containing Enlist herbicide tolerance traits. This is not an offer for sale of Enlist.

Additional Information:

More information can be found through this weed science resource:

1Everman, W., C. Sprague, S. Grower, R. Richardson. 2010. An IPM Pocket Guide for Weed Identification in Field Crops.
2PLANTS Profile. United States Department of Agriculture Natural Resources Conservation Service website. http://plants.usda.gov
3Morningglories. University of California Agriculture and Natural Resources. http://ucipm.ucdavis.edu/PMG/WEEDS/morningglories.html
4Price, A. J., and J. W. Wilcut. Response of Ivyleaf Morningglory (Ipomoea hederacea) to Neighboring Plants and Objects. http://www.jstor.org/discover/10.2307/25194949?uid=3739568&uid=2129&uid=2&uid=70&uid=4&uid=3739256&sid=21104229549943
5Hort Answers. University of Illinois Extension. http://urbanext.illinois.edu/hortanswers/plantdetail.cfm?PlantID=529&PlantTypeID=5

®™DOW Diamond, Colex-D, Duramax, Durango, DMA, Enlist, Enlist Duo, Enlist E3, FirstRate, FulTime, Hornet, Keystone, Python, Sonic, SureStart II, Surpass and Surveil are trademarks of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. FulTime NXT, Keystone LA NXT and Keystone NXT are federally Restricted Use Pesticides. State restrictions on the sale and use of Hornet WDG apply. Consult the label before purchase or use for full details. Duramax, Durango DMA, FulTime NXT, Keystone LA NXT, Keystone NXT, Sonic, SureStart II, Surpass NXT and Surveil Co-pack are not registered for sale or use in all states. FulTime NXT, Keystone LA NXT, Keystone NXT, SureStart II and Surpass NXT are not available for sale, distribution or use in Nassau and Suffolk counties in the state of New York. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Enlist E3 soybeans are being jointly developed by MS Technologies and Dow AgroSciences. Regulatory approvals are pending for the Enlist herbicide solution and crops containing Enlist herbicide tolerance traits. The information presented here is not an offer for sale. Always read and follow label directions. ©2014 Dow AgroSciences LLC