- Various 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
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.
- 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:
SureStart® II herbicide
Keystone® NXT herbicide
Keystone® LA NXT herbicide
FulTime® NXT herbicide
Surpass® NXT herbicide
Hornet® WDG herbicide
Durango® DMA® herbicide
Enlist™ Weed Control System,* when commercialized
More information can be found through this weed science resource:
- Morning Glory — Penn State University