Every year Waikato Regional Council carries out targeted spray operations to control invasive pest plants growing in our rivers, lakes and wetlands.
This work is important to protect the environment – and in particular agricultural production – from the impacts of these pest plants, as well as to improve biodiversity.
Resource consent 124871
Waikato Regional Council holds a resource consent (124871) to carry out this work. The consent authorises:
- the application of agrichemicals to air where they may enter water and the coastal marine area within the Waikato region, and
- the use of specific herbicides for controlling pest plants that cannot generally be controlled with glyphosate.
Public notice - spraying operations
Waikato Regional Council advises that under Resource Consent 124871 spraying of pest plants growing in aquatic and semi-aquatic locations will continue over the next three months.
You can read the public notice below. For specific details of when, where and what we are spraying, please check the scheduled operations information on this webpage.
Where and when are we spraying?
Where are we spraying?
You can access and view our map of operational areas using the link above.
- Operational areas are shown on the map with purple shading.
- Use the Search bar in the top left-hand corner to search for your address and see where spraying is happening in relation to your property.
When are we spraying?
Application may occur at any time during daylight hours, providing weather and tide conditions are suitable.
As these pest plants are difficult to control, two to three follow-up applications may occur over the next 12 months. It is unlikely that spraying will occur during duck shooting season. There will be no spraying on public holidays.
For more details, see the list of scheduled spraying operations on this page.
Register for notifications
We can notify you by email or text message of specific times when spraying is happening near your property.
- First, use the map (link above) to find the operational area you want to be notified for.
- Click on the area and then click "Sign up for notifications". This will direct you to an online form to register for notification. Easy!
What we use and control
Scheduled herbicide control operations
Below is a list of scheduled spraying operations. This list is updated regularly, so please check this page for updates.
| Date | Location | Control type | Herbicide | Target pest plants | Contact |
|---|---|---|---|---|---|
|
6 January - 27 January 2025 (weather permitting) |
Lower Waikato River - Ngaruawahia to Mercer and Te Onetea Stream |
Mist-blower, gun and hose |
Metsulfuron |
Alligator weed |
Philip Mabin on 021 502 099 |
|
20 December - 23 December 2024 (weather permitting) |
Lower Waikato River - Ngaruawahia to Mercer |
Mistblower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021 502 099 |
|
9 December - 20 December 2024 (weather permitting) |
Kawhia Harbour - Hikuparea Road, Kawhia |
Knapsack gun and hose |
Metsulfuron; Glyphosate |
Alligator weed |
Frances McKinnon on 027 330 8016 |
|
9 December - 27 December 2024 (weather permitting) |
Ruahorehore Stream, Waihi |
Knapsack |
Metsulfuron |
Alligator weed |
Heidi Pene on 027 248 6447 |
|
5 December - 20 December 2024 (weather permitting) |
Turiakina Stream Mouth |
Knapsack |
Metsulfuron, Glyphosate |
Alligator weed, yellow flag iris |
Frances McKinnon on 027 330 8016 |
|
5 December - 20 December 2024 (weather permitting) |
Tauhua Stream |
Knapsack |
Metsulfuron, Glyphosate |
Alligator weed, yellow flag iris |
Frances McKinnon on 027 330 8016 |
|
5 December - 20 December 2024 (weather permitting) |
TM Station Drains |
Knapsack |
Metsulfuron, Glyphosate |
Alligator weed, yellow flag iris |
Frances McKinnon on 027 330 8016 |
|
4 December - 20 December 2024 (weather permitting) |
Lake Rotoroa |
Knapsack |
Metsulfuron |
Yellow flag iris |
Hamish Hodgson on 021 569 206 |
|
3 December - 13 December 2024 (weather permitting) |
Holland Close, Pauanui |
Knapsack |
Metsulfuron |
Alligator weed |
Hamish Hodgson on 021 569 206 |
|
2 December - 23 December 2024 (weather permitting) |
Rutherford Road Drains, Mangawara |
Knapsack, gun and hose |
Metsulfuron |
Alligator weed |
Reuben Libline on 021 972 962 |
|
2 December - 23 December 2024 (weather permitting) |
Matahuru Stream and Drains |
Knapsack |
Metsulfuron |
Alligator weed |
Reuben Libline on 021 972 962 |
|
27 November - 18 December 2024 (weather permitting) |
Hall Road Wetland |
Mistblower and knapsack |
Metsulfuron |
Alligator weed |
Hamish Hodgson on 021 569 206 |
|
26 November - 17 December 2024 (weather permitting) |
Ohinemuri River from Baxter Road, Waihi to Paeroa Township |
Knapsack |
Metsulfuron |
Alligator weed |
Heidi Pene on 027 248 6447 |
|
26 November - 10 December 2024 (weather permitting) |
Waihou River from Hikutaia Cut to Kopu - True left |
Gun and hose |
Haloxyfop |
Spartina, Manchurian wild rice |
Heidi Pene on 027 248 6447 |
|
25 November - 16 December 2024 (weather permitting) |
Whangamaire Stream |
Knapsack, mistblower |
Metsulfuron |
Yellow flag iris |
Reuben Libline on 021 972 962 |
|
28 November - 20 December 2024 (weather permitting) |
Tuhikaramea Stream |
Knapsack, Gun and hose, Mist blower |
Metsulfuron, Glyphosate |
Yellow flag iris |
Frances McKinnon on 027 330 8016 |
|
19 November 2024 – 10 December 2024 (weather permitting) |
Lower Waikato River, Ngaruawahia to Whangape Stream |
Knapsack, Gun and hose, Mist blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
14 November 2024 - 12 December 2024 (weather permitting) |
Pooles Road Drain and Gordon Ave Wetland and pond - Te Aroha |
Knapsack |
Metsulfuron |
Alligator weed |
Heidi Pene on 027 248 6447 |
|
11 November 2024 – 11 December 2024 (weather permitting) |
Lincoln Street drain to Kahikatea Road drain |
Knapsack, Gun and hose, Mist blower |
Metsulfuron |
Alligator weed |
Annemarie Robb on 0212849734 |
|
11 November 2024 – 11 December 2024 (weather permitting) |
Mangakotukutukutu Stream, Peacockes |
Knapsack, Gun and hose, Mist blower |
Metsulfuron |
Alligator weed |
Annemarie Robb on 0212849734 |
|
11 November 2024 – 11 December 2024 (weather permitting) |
Sandford Gully, Glenview |
Knapsack, Mist blower |
Metsulfuron |
Japanese knotweed |
Annemarie Robb on 0212849734 |
|
11 November 2024 – 11 December 2024 (weather permitting) |
Somerton Ponds and Kirikiriroa Stream - Thomas Road |
Knapsack, Gun and hose, Mist blower |
Metsulfuron |
Alligator weed |
Annemarie Robb on 0212849734 |
|
11 November 2024 – 11 December 2024 (weather permitting) |
Gordonton-Puketaha Road |
Knapsack, Gun and hose, Mist blower |
Metsulfuron |
Alligator weed |
Annemarie Robb on 0212849734 |
|
11 November 2024 – 11 December 2024 (weather permitting) |
Stream Wairere Drive, Logan Court, Milbrook Place |
Knapsack |
Metsulfuron |
Alligator weed, Yellow flag iris |
Annemarie Robb on 0212849734 |
|
11 November 2024 – 2 December 2024 (weather permitting) |
Kawhia Harbour, Aotea Harbour |
Knapsack, Gun and hose |
Metsulfuron, Glyphosate |
Alligator weed |
Frances McKinnon on 0273308016 |
|
11 November 2024 – 30 November 2024 (weather permitting) |
Te Onetea Stream |
Knapsack, Mist blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
|
11 November 2024 – 29 November 2024 (weather permitting) |
Ruapuke Stream Mouth, Toreparu Stream, Matauwai Stream |
Knapsack, Gun and hose |
Metsulfuron, Glyphosate |
Alligator weed, Yellow flag iris |
Frances McKinnon on 0273308016 |
|
7 November 2024 – 28 November 2024 (weather permitting) |
Pukerimu Lane Ponds |
Knapsack, Gun and hose |
Metsulfuron, Glyphosate |
Yellow flag iris |
Frances McKinnon on 0273308016 |
29 October – 25 November 2024 (weather permitting) |
Small pond on dairy farm Matai Rd Matamata |
Knapsack, Gun and hose, Mist blower |
Metsulfuron |
Yellow flag iris |
Heidi Pene on 027 248 6447 |
29 October – 18 November 2024 (weather permitting) |
Small stream from Kereone Road to Cussen Road Morrinsville |
Knapsack |
Metsulfuron |
Yellow flag iris |
Heidi Pene on 027 248 6447 |
29 October – 18 November 2024 (weather permitting) |
Maungahaumia Stream - Matuku Rd to Morrinsville Tahuna Rd Morrinsville |
Knapsack, Gun and hose |
Metsulfuron |
Yellow flag iris |
Heidi Pene on 027 248 6447 |
25 October 2024 – 15 November 2024 (weather permitting) |
Paratawa Stream - Old Mountain Road |
Knapsack, Gun and hose |
Metsulfuron, Glyphosate |
Yellow flag iris |
Frances McKinnon on 027 330 8016 |
|
19 October 2024 – 9 November 2024 (weather permitting) |
Lower Waikato River. Horotiu to Tuakau |
Knapsack, Mist-blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
|
15 October – 5 November 2024 (weather permitting) |
Pond and stream at Pirongia Road, Pond at Raynes Road, Te Puroa Road, Ngaruawahia |
Knapsack |
Metsulfuron, Glyphosate |
Yellow flag iris |
Frances McKinnon on 0273308016 |
|
7 October 2024 – 28 October 2024 (weather permitting) |
Waikato River - Port Waikato to Tauranganui |
Gun and hose |
Metsulfuron |
Alligator weed |
Hamish Hodgson on 021459206 |
|
7 October 2024 – 28 October 2024 (weather permitting) |
Komakorau Stream near Golf course |
Knapsack |
Metsulfuron |
Alligator weed |
Reuben Libline on 021972962 |
|
26 September 2024 - 17 October 2024 (weather permitting) |
Lower Waikato River. Horotiu to Mercer. Te Onetea Stream |
Knapsack, Mist-blower |
Metsulfuron |
Alligator weed, Yellow flag iris |
Philip Mabin on 021502099 |
|
18 September – 9 October 2024 (weather permitting) |
Pirongia Road, Old Mountain Road, Te Puroa Road, Pukerimu Lane, Clearway Rise, Tuhikaramea Stream |
Knapsack, Gun and hose |
Metsulfuron, Glyphosate |
Yellow flag iris |
Frances McKinnon on 0273308016 |
|
16 September 2024 – 7 October 2024 (weather permitting) |
Huntly pools by Tainui Bridge |
Knapsack, Gun and hose, Mist-blower |
Metsulfuron |
Alligator weed, Yellow flag iris |
Reuben Libline on 021972962 |
|
10 September 2024 – 1 October 2024 (weather permitting) |
Murphy Lane Wetland Taupiri |
Knapsack, Mist-blower |
Metsulfuron |
Yellow flag iris |
Reuben Libline on 021972962 |
|
4 September 2024 - 24 September 2024 (weather permitting) |
Lower Waikato River. Horotiu to Mercer. Te Onetea Stream |
Knapsack, Mist-blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
|
14 August – 4 September 2024 (weather permitting) |
Lower Waikato River. Horotiu to Mercer. Te Onetea Stream |
Knapsack, Mist-blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
|
1 July – 21 July 2024 (weather permitting) |
Waikato River, Huntly to Whangape Stream, Te Onetea Stream |
Knapsack, Mist-blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
|
1 July – 21 July 2024 (weather permitting) |
Waikato River, Horotiu to Huntly |
Knapsack, Mist-blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
|
21 June – 5 July 2024 (weather permitting) |
Pond at Cambridge golf course |
Knapsack, Gun and hose |
Imazapyr |
Water poppy |
Frances McKinnon on 0273308016 |
|
10 June – 30 June 2024 (weather permitting) |
Lower Waikato River, Huntly to Mercer |
Mist blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
|
7 June – 28 June 2024 (weather permitting) |
Te Otamanui Lagoon |
Knapsack, Gun and hose |
Metsulfuron |
Alligator weed, Senegal tea |
Frances McKinnon on 0273308016 |
|
3 June – 24 June 2024 (weather permitting) |
Te Poi private property small stream off Tauranga Road |
Knapsack, Gun and hose |
Imazapyr |
Water poppy |
Heidi Pene on 0272486447 |
|
31 May – 25 June 2024 (weather permitting) |
Mangaonua Stream |
Knapsack, Gun and hose, Mist blower |
Metsulfuron, Glyphosate |
Alligator weed |
Frances McKinnon on 0273308016 |
|
29 May – 12 June 2024 (weather permitting) |
Waihi Campground pond |
Knapsack |
Metsulfuron |
Yellow flag iris |
Heidi Pene on 0272486447 |
|
28 May – 11 June 2024 (weather permitting) |
Horahora wetlands on private property |
Knapsack, Gun and hose |
Haloxyfop |
Manchurian wild rice |
Heidi Pene on 0272486447 |
|
28 May – 11 June 2024 (weather permitting) |
Private property in Puriri - small gully stream |
Knapsack, Gun and hose |
Haloxyfop |
Manchurian wild rice |
Heidi Pene on 0272486447 |
|
27 May – 17 June 2024 (weather permitting) |
Tauhua Stream and Turiakina Stream |
Knapsack, Gun and hose |
Metsulfuron, Glyphosate |
Alligator weed |
Frances McKinnon on 0273308016 |
|
27 May – 17 June 2024 (weather permitting) |
Pond at Cambridge golf course |
Knapsack, Gun and hose |
Imazapyr |
Water poppy |
Frances McKinnon on 0273308016 |
|
20 May – 3 June 2024 (weather permitting) |
Pond on private property Tauranga Road Te Poi |
Knapsack, Gun and hose |
Metsulfuron |
Yellow flag iris |
Heidi Pene on 0272486447 |
|
20 May – 3 June 2024 (weather permitting) |
Waihi Township Small creeks and Drains |
Knapsack |
Metsulfuron |
Yellow flag iris |
Heidi Pene on 0272486447 |
|
13 May – 27 May 2024 (weather permitting) |
Private property in Puriri - small gully stream |
Gun and hose |
Haloxyfop |
Manchurian wild rice |
Heidi Pene on 0272486447 |
|
13 May – 27 May 2024 (weather permitting) |
Horahora Wetlands on private property |
Gun and hose |
Haloxyfop |
Manchurian wild rice |
Heidi Pene on 0272486447 |
|
8 May – 30 May 2024 (weather permitting) |
Turiakina Stream Mouth, Marokopa and Tauhua Stream |
Knapsack, Gun and hose, Mist blower |
Metsulfuron, Glyphosate |
Alligator weed |
Frances McKinnon on 0273308016 |
|
6 May – 24 May 2024 (weather permitting) |
Tainui Street & Rerenga Street Drain, Mokau and Pond at Redwood Park, Otorohanga |
Knapsack, Gun and hose, Mist blower |
Imazapyr |
Rough Horsetail, Field Horsetail |
Frances McKinnon on 0273308016 |
|
30 April – 21 May 2024 (weather permitting) |
Hall Road Wetland |
Knapsack, Mist blower |
Metsulfuron |
Alligator weed |
Hamish Hodgson on 021569206 |
|
30 April – 21 May 2024 (weather permitting) |
Stream near Wairere Drive, Logan Court, Milbrook Place |
Knapsack, Mist blower |
Metsulfuron |
Alligator weed |
Hamish Hodgson on 021569206 |
|
30 April – 30 April 2024 (weather permitting) |
Lincoln Street Drain to Kahikatea Road Drain |
Knapsack, Mist blower |
Metsulfuron |
Alligator weed |
Hamish Hodgson on 021569206 |
|
30 April – 30 April 2024 (weather permitting) |
Chartwall Gully |
Knapsack, Mist blower |
Metsulfuron |
Yellow flag iris |
Hamish Hodgson on 021569206 |
|
29 April – 20 May 2024 (weather permitting) |
Sommerton Ponds and Kirikiriroa Stream |
Knapsack, Mist blower |
Metsulfuron |
Alligator weed |
Hamish Hodgson on 021569206 |
|
29 April – 29 April 2024 (weather permitting) |
Stream - corner Gordonton-Puketaha Road |
Knapsack, Mist blower |
Metsulfuron |
Alligator weed |
Hamish Hodgson on 021569206 |
|
29 April 2024 - 17 May 2024 (weather permitting) |
Waikato River and Mystery Creek |
Knapsack, Gun and hose |
Metsulfuron, Glyphosate |
Alligator weed |
Frances McKinnon on 0273308016 |
|
29 April 2024 - 17 May 2024 (weather permitting) |
Aotea Harbor - Aotea Road |
Knapsack, Gun and hose, Mist blower |
Metsulfuron, Glyphosate |
Alligator weed |
Frances McKinnon on 0273308016 |
|
29 April 2024 - 17 May 2024 (weather permitting) |
Kawhia Harbor - Hikuparea Road |
Knapsack, Gun and hose, Mist blower |
Metsulfuron, Glyphosate |
Alligator weed |
Frances McKinnon on 0273308016 |
|
29 April 2024 - 18 May 2024 (weather permitting) |
Te Otamanui Lagoon - Te Kowhai South |
Knapsack, Gun and hose |
Metsulfuron |
Senegal tea |
Frances McKinnon on 0273308016 |
|
22 April – 6 May 2024 (weather permitting) |
Waimakariri River between SH5 and Waihou River confluence |
Knapsack |
Haloxyfop |
African Feather Grass |
Heidi Pene on 0272486447 |
|
21 April – 3 May 2024 (weather permitting) |
Waihou River Turua, from Hikutaia Cut to Kopu (True Right) |
Gun and hose |
Haloxyfop |
Manchurian wild rice, Spartina |
Heidi Pene on 0272486447 |
|
22 April 2024 - 30 April 2024 (weather permitting) |
Lower Ohinemuri River |
Mist blower |
Metsulfuron |
Alligator weed |
Philip Mabin on 021502099 |
|
17 April 2024 - 10 May 2024 (weather permitting) |
Tuhikaramea Stream |
Knapsack, Gun and hose, Mist blower |
Metsulfuron, Glyphosate |
Yellow flag iris |
Frances McKinnon on 0273308016 |
|
16 April 2024 - 7 May 2024 (weather permitting) |
Port Waikato |
Knapsack, Gun and hose |
Metsulfuron |
Alligator weed |
Reuben Libline on 021972962 |
Past herbicide spraying operations
You can see details below of herbicide spraying operations that have been carried out over the past year. If you would like details of earlier spraying operations, please contact us.
| Date | Location | Control type | Herbicide | Target pest plants |
|---|---|---|---|---|
| 16 April - 6 May 2024 (weather permitting) | Huntly to Whangape Stream | Mist blower | Metsulfuron |
Alligator weed |
| 11 April - 3 May 2024 (weather permitting) | Whangaipeteki Stream at Hill Road | Knapsack, Gun & hose | Metsulfuron |
Climbing Spindleberry |
| 11 April - 3 May 2024 (weather permitting) | Pond at Clark Lane | Knapsack, Gun & hose | Metsulfuron, Imaxapyr, Glyphosate |
Sagittaria |
| 11 April - 3 May 2024 (weather permitting) | Cambridge golf course pond | Knapsack, Gun & hose | Metsulfuron, Imaxapyr, Glyphosate |
Water poppy, Sagittaria |
| 11 April - 3 May 2024 (weather permitting) | Ruapuke Stream, Toreparu Stream, Taharoa Beach, TM Station Drains, Tauhua Stream, Turiakina Stream | Knapsack, Mist blower, Gun and hose | Metsulfuron, Glyphosate |
Alligator weed, Yellow flag iris |
| 11 April - 24 April 2024 (weather permitting) | Horahora of farm wetlands, Maungatautari Road | Gun & hose | Haloxyfop |
Manchurian wild rice |
| 8 April - 30 April 2024 (weather permitting) | Waikato River - Port Waikato to Tuaranginui | Knapsack, Gun & hose, Mist blower | Metsulfuron |
Water poppy |
| 7 April - 22 April 2024 (weather permitting) | Waihou River from Hikutaia cut to Kopu Bridge - True right | Gun and hose | Haloxyfop |
Manchurian wild rice, Spartina |
| 1 April - 15 April 2024 (weather permitting) | Lake Rotokaeo | Knapsack, Gun & hose, Mist blower | Metsulfuron |
Alligator weed |
| 1 April - 16 April 2024 (weather permitting) | Otaua Road Drains & Crouch Road Drains | Gun and hose | Metsulfuron |
Alligator weed |
| 25 March - 15 April 2024 (weather permitting) | Komakorau stream | Knapsack, Gun and hose | Metsulfuron |
Alligator weed, Yellow flag iris |
| 25 March - 16 April 2024 (weather permitting) | Mangaonua Stream | Knapsack, Mist blower, Gun and hose | Metsulfuron, Glyphosate |
Alligator weed, Yellow flag iris |
| 25 March - 15 April 2024 (weather permitting) | Waikato River, Huntly to Ohinewai | Gun and hose, Mist-blower | Metsulfuron |
Alligator weed |
| 21 March - 31 March 2024 (weather permitting) | Tauranga hi to Tuakau Bridge | Knapsack, Gun & hose | Metsulfuron |
Alligator weed |
| 21 March - 31 March 2024 (weather permitting) | Port Waikato to Tuaranginui | Knapsack, Gun & hose | Metsulfuron |
Alligator weed |
| 18 March – 15 April 2024 (weather permitting) | Waikato River - Mercer to Hampton Downs | Knapsack, Mist blower | Metsulfuron |
Alligator weed, Yellow flag iris |
| 18 March – 8 April 2024 (weather permitting) | Aotea Harbour & Kawhia Harbour | Knapsack, Mist blower, Gun and hose | Metsulfuron, Glyphosate |
Alligator weed |
| 18 March – 8 April 2024 (weather permitting) | Waikato River - Hampton Downs to Whangape Stream | Knapsack, Mist blower | Metsulfuron |
Alligator weed, Yellow flag iris |
| 18 March – 8 April 2024 (weather permitting) | 1589 SH25 Tairua-Whitianga Highway | Knapsack, Gun and hose | Metsulfuron, Glyphosate |
Water poppy |
| 7 March - 28 March 2024 (weather permitting) | Whangamarino Wetland and River | Helicopter | Metsulfuron |
Alligator weed |
| 7 March - 21 March 2024 (weather permitting) | Waihou River from Hikutaia Cut to Kopu - True left | Gun and hose | Haloxyfop |
Manchurian wild rice, Spartina |
| 4 March - 31 March 2024 (weather permitting) | Hall Road Wetland | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Alligator weed |
| 4 March - 31 March 2024 (weather permitting) | Sandford Gully, Glenview | Knapsack | Imazapyr |
Japanese knotweed |
| 4 March - 31 March 2024 (weather permitting) | Lake Rotokaeo | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Mexican water lily |
| 4 March - 31 March 2024 (weather permitting) | Pond and Stream - Pukekawa | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Mexican water lily |
| 1 March - 22 March 2024 (weather permitting) | Huntly Ponds | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Alligator weed, Yellow flag iris |
| 29 February – 15 March 2024 (weather permitting) | Pond and Stream - Pukekawa | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Alligator weed |
| 23 February – 15 March 2024 (weather permitting) | Mangakaware Stream and Wetland | Knapsack, Gun and hose, Mist blower | Metsulfuron, Glyphosate |
Alligator weed |
| 22 February – 13 March 2024 (weather permitting) | Whangape Stream to Tuakau | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Alligator weed |
| 19 February – 11 March 2024 (weather permitting) | Awaroa River | Knapsack | Metsulfuron |
Senegal tea |
| 19 February – 15 March 2024 (weather permitting) | Te Mata Stream and Opotoru River | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Yellow flag iris |
| 16 February - 8 March 2024 (weather permitting) | Rutherford Road Drains, Mangawara | Knapsack, Gun and hose | Metsulfuron |
Alligator weed |
| 16 February - 8 March 2024 (weather permitting) | Matahuru Stream | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Alligator weed |
| 13 February - 23 February 2024 (weather permitting) | Taharoa Beach and TM Station Drains | Knapsack, Gun and hose, Mist blower | Metsulfuron, Glyphosate |
Alligator weed |
| 7 February – 28 February 2024 (weather permitting) | Waihou River True left, Hikutaia Cut to Abbatoir Road Turua | Gun and hose | Haloxyfop |
Manchurian wild rice, Spartina |
| 7 February – 28 February 2024 (weather permitting) | Waihou River True right Hikutaia Cut to Kopu | Gun and hose | Haloxyfop |
Manchurian wild rice, Spartina |
| 31 January – 23 February 2024 (weather permitting) | Te Otamanui Lagoon | Helicopter, Knapsack, Gun and hose, Mist blower | Metsulfuron, Triclopyr, Gylphosate |
Alligator weed |
| 30 January – 20 February 2024 (weather permitting) | Lincoln Street Drain to Kahikatea Road Drain | Knapsack, Mist blower | Metsulfuron |
Alligator weed |
| 30 January – 20 February 2024 (weather permitting) | Stream near Wairere Drive, Logan Court, Milbrook Place | Knapsack, Mist blower | Metsulfuron |
Alligator weed |
| 30 January – 20 February 2024 (weather permitting) | Stream corner Gordonton-Puketaha | Knapsack, Mist blower | Metsulfuron |
Alligator weed |
| 30 January – 20 February 2024 (weather permitting) | Somerton Ponds and Kirikiriroa Stream - Thomas Road | Knapsack, Mist blower | Metsulfuron |
Alligator weed |
| 30 January - 19 February 2024 (weather permitting) |
Lower Waikato River – Huntly to Tuakau, including Te Onetea Stream and Whangape Stream |
Gun and hose, Mist blower, knapsack | Metsulfuron |
Alligator weed |
| 30 January - 16 February 2024 (weather permitting) | Waimakariri and Waihou River from SH 5 to Okoroire Hotel | Knapsack | Haloxyfop |
African feather grass |
| 30 January - 13 February 2024 (weather permitting) | Ruahorehore Stream | Knapsack | Metsulfuron |
Alligator weed |
| 30 January - 6 February 2024 (weather permitting) | Waihou River True left from Hikutaia Cut to Kopu | Gun and hose | Haloxyfop |
Manchurian wild rice, Spartina |
| 22 January – 12 February 2024 (weather permitting) | Ngaawapurua Rapids to Broadlands | Knapsack, Mist blower | Metsulfuron |
Yellow flag iris |
| 17 January – 14 February 2024 (weather permitting) | Lake Whangape and Whangape Stream | Helicopter | Metsulfuron |
Alligator weed |
| 15 January - 5 February 2024 (weather permitting) | Huriwai River | Knapsack, Gun and hose | Metsulfuron |
Alligator weed |
| 22 January – 12 February 2024 (weather permitting) | Aotea Harbour and Kawhia Harbour | Knapsack, Gun and hose, Mist blower | Metsulfuron, Gylphosate |
Alligator weed |
| 22 January – 12 February 2024 (weather permitting) | Taharoa Beach, TM Station Drains, Tauhua Stream, Turiakina Stream and Tareparu Stream | Knapsack, Gun and hose | Metsulfuron, Gylphosate |
Alligator weed, Yellow flag iris |
| 9 January - 23 January 2024 (weather permitting) | Waihou River True left from Hikutaia Cut to Kopu | Gun and hose | Haloxyfop |
Manchurian wild rice, Spartina |
| 8 January - 29 January 2024 (weather permitting) | Whangamarino Wetland and Maramarua River, Kimihia Wetland | Helicopter | Metsulfuron |
Alligator weed, Yellow flag iris |
| 8 January - 31 January 2024 (weather permitting) | Te Otamanui Lagoon | Helicopter, Knapsack, Gun and hose, Mist blower | Metsulfuron, Gylphosate |
Alligator weed |
| 8 January - 29 January 2024 (weather permitting) | Port Waikato to Tauranganui and Tauranganui to Tuakau Bridge | Helicopter, Gun and hose, Mist blower | Metsulfuron |
Alligator weed |
| 8 January - 28 January 2024 (weather permitting) | Lower Waikato River, Ngaruawahia to Tuakau, including Lake Whangape and Whangape Stream | Knapsack, Gun and hose, Mist blower | Metsulfuron |
Alligator weed, Yellow flag iris |
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