Weed Directory

Lotus pedunculatus

Common name: Lotus.

Invasiveness: Not a major concern; mainly a garden weed and pasture species.

Control: Spray with Glyphosate* at label rates, or pull out by hand in small areas.

 

 

Rhododendron ponticum

Common name: Rhododendron 'Sir Robert Peel'.

Invasiveness: Very invasive tree weed. Seeds beneath and replaces native bush by producing toxic phenols and diterpenes.

Control: Cut, drill, and fill with Glysophate*.

 

 

Lilium tigrinum

Common name: Tiger lily.

Invasiveness: Moderately invasive in open areas.

Control: Spray with Escort or similar, or pull out by hand and dispose to landfill.

 

 

Iris feotidissima

Common name: Stinking iris

Invasiveness: Not sure if this is the correct ID for the plant in this photo. See more information at http://www.weedbusters.co.nz.

Control: Spray with Escort or pull out by hand.

 

Cotoneaster simonsii

Common name: Khasia berry.

Invasiveness: One of the most invasive cotoneasters. Spread by birds. Moderately shade-tolerant.

Control: Cut stems at ground level and apply herbicide (e.g., Vigilant gel, 10% glyphosate*). Spray smaller plants with Escort or similar.

 

 

Buddleja davidii

Common name: Buddleia.

Invasiveness: Very invasive in riverbeds and gravelly areas. Spread by fine seed.

Control: Cut stems at ground level and apply herbicide (e.g., Vigilant gel, 10% glyphosate*). Spray smaller plants with Escort or similar.

 

 

Zantedeschia aethiopica "Green Goddess"

Common name: Arum lily ("Green Goddess" variety).

Invasiveness: Very invasive variety of arum lily. Spread by bird-dispersed seeds and dumping.

Control: Very hard to kill. Try cutting off the stems and applying Vigilant gel.

 

 

Leycesteria formosa

Common name: Himalayan honeysuckle.

Invasiveness: Invasive in open areas, scrub, and disturbed forest but not very tolerant of shade. Spread rapidly by birds.

Control: Spray all foliage with glyphosate*, Escort, or similar.

 

 

Crocosmia x crocosmiiflora

Common name: Montbretia.

Invasiveness: Invasive along riverbanks and roadsides. A problem in gardens.

Control: Dig out all bulbs (this is difficult to achieve, however), and dispose at landfill. Otherwise, spray with Glyphosate* or Escort. Some follow-up will probably be needed.

 

 

Tradescantia fluminensis

 

Common name: Wandering Jew/Willie.

Invasiveness: Very invasive and shade-tolerant. Ground cover suppresses regeneration and invades forest floor. Spread by plant fragments.

Control: Hand-pull small areas, but be very thorough and dispose to landfill. Spray foliage with Grazon (easy and effective).

 

 

Hypericum androsaemum

Common name: Tutsan.

Invasiveness: Moderately invasive. Berries spread by birds.

Control: Spray with Glyphosate* or Escort. Do not pull out by hand, as brittle root will break and regrow.

 

 

Hypericum kouytchense

Common name: None.

Invasiveness: Moderately invasive. Spread by fine seeds (no berries).

Control: Spray with Glyphosate* or Escort. Do not pull out by hand, as brittle root will break and regrow.

 

 

Lonicera japonica

Common name: Japanese honeysuckle.

Invasiveness: Very invasive climber. Berries spread into forested areas by birds, or by cuttings in dumped garden rubbish.

Control: Cut at ground level and apply Vigilant gel to stem, or spray all foliage with glyphosate* or Escort.

 

 

Solanum chenopodioides

Common name: Velvety nightshade.

Invasiveness: Not a major problem. Spread by birds into disturbed scrub and forest margins.

Control: Pull out by hand and leave to rot, or spray with glyphosate*.

 

 

Calystegia silvatica

Common name: Greater bindweed.

Invasiveness: Moderately invasive climber, spread mostly by garden rubbish dumping (fragments).

Control: Spray with Escort.

 

 

* Glyphosate is the active ingredient in Roundup and a number of other similar products.