Blue morning glory
Convolvulaceae - Ipomoea indica
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What does it look like?

High climbing vine with tough, hairy, twining, running stems with tough fibrous roots without rhizomes. Leaves (5-18 x 5-16 cm) are usually 3-lobed and silky-hairy underneath. From late spring to early winter, groups of 3-12 deep blue-purple flowers that are pink at the base and wither in the midday sun are produced. Little or no seed is produced in New Zealand.

Why is it a problem?

Very fast growth rate, longevity, dense smothering habit and ability to climb to top of high canopy makes this the dominant vine wherever it occurs. Tolerates hot to cool temperatures, and damp to dry conditions.

Control Methods

Physical control

  • Hand-pull small plants any time of year, ensuring all stem and root fragments are dug out. Dispose of roots at a refuse transfer station and leave the tops of vines not in contact with the ground to rot away on site.

Herbicide

  • Cut and stump-treat larger stems (within 10 minutes of cutting) with 100ml glyphosate (360g/l e.g. Round-up®) +1g metsulfuron-methyl (600g/kg e.g. Escort®) per 1 litre water; or
  • Spray with 100ml glyphosate and 20ml penetrant per 10 litres water or 2g metsulfuron-methyl per 10 litres water.

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