The information provides context as to why the slips have occurred, what’s being done, by whom and against what timeframes.

If you would like to speak to a member of Council’s operations team regarding the slips please don’t hesitate to contact Peter Clark, Council’s Development Engineering Manager.

You can send Peter an email at Peter.Clark@westernbay.govt.nz or call him on 571 8008 during business hours.
 

Weed species typically found along the margins of the Omokoroa Peninsula and methods of control

Introduction

The pest plant species referred to in this guide have been identified along the margins of the Omokoroa Peninsular.  These species present threats to this environment by displacing more advantageous and effective slope stabilising species.  Many of the plant pests will smother and destroy the valuable native vegetation cover and some pests will actually exacerbate the instability of steep slopes.

The following information is provided for the identification and effective control of these plant pests.

Since the information presented in this guide was previously prepared for a broad range of sites and conditions it is provided here in a general form; accordingly, some management practices, such as aerial spraying, mentioned herein may be appropriate in a rural setting but will not be appropriate around Omokoroa Peninsula.

The plant pest control information provided here does not exclude all other practices, but details those practices which are proven to be effective and efficient; indeed, for some plant pests there are no known alternative practices which will work.  Also there is a range of herbicide brands with the same active ingredients.  It is the herbicide’s active ingredients which are important; however, some common brand names have been mentioned in this guide simply because of public familiarity and understanding.  This is not an endorsement to use those particular brands but rather advice about the type of herbicide which will need to be selected for an effective outcome.

This guide is arranged by grouping plant pests in the following order: 1) Large Trees, 2) Small Trees, 3) Bushes & Shrubs, 4) Lilies & Tuberous Pests, 5) Grasses and Herbaceous Pests, 6) Canopy & Sub-canopy Vines, 7) Low Vines & Scramblers, 8) Groundcover & Creepers.  Within each group the plants appear in alphabetical order.  Additional useful information, including a schedule of herbicides, is provided after the list of plant pest species.

General Considerations

Manuka & flaxes are highly susceptible to Roundup (Glyphosate) so we suggest extreme care with this herbicide wherever Manuka or flax is growing, or perhaps use an alternative herbicide where an alternative will be effective.

Particularly in wetland environments there is merit in doing supplementary planting of native species following substantive weed control, as this will accelerate the process of natural re-colonisation to out-compete reinvasion of plant pests and thereby reduce future maintenance requirements.

Further information sources

Further to this weed management guide, three useful internet web addresses are supplied for additional weed identification information and advice on weed control methods.  These are:

(i)  www.boprc.govt.nz/environment/pests/pest-plants-and-weeds/weed-index/

(ii)  www.arc.govt.nz/environment/plants-and-animals/pest-plants/pest-plants_home.cfm

(iii) www.weedbusters.org.nz

Weed Control Guide - Large Trees
Weed Control Guide - Small Trees
Weed Control Guide - Bushs and Shrubs
Weed Control Guide - Lilies and Tuberous Pests
Weed Control Guide - Grass and Herbaceous Pests
Weed Control Guide - Canaopy and Subcanopy Vines
Weed Control Guide - Low Vines and Scramblers
Weed Control Guide - Groundcover and Creepers
Weed Control Guide - Herbicides and Trade Names