March 06, 2026

#economy: Drone Glyphosate Spraying at Te Henga Proceeds Despite Court Appeal

Matthew Tukaki Posted On March 6, 2026

A controversial plan to spray glyphosate by drone over sensitive wetlands at Te Henga on Auckland’s west coast is going ahead despite an appeal currently before the Environment Court.

Environmental advocates say the spraying is targeting invasive weeds within a protected wetland area that is home to endangered native species. However, critics argue the decision to proceed while legal challenges remain unresolved raises serious concerns about ecological risk and regulatory oversight.

The operation involves aerial application of glyphosate using drones across parts of the Te Henga wetlands. Supporters of the programme say the spraying is intended to control invasive plant species that threaten the health of the wetland ecosystem and native biodiversity.

Opponents, including environmental groups and local campaigners, say the project could harm the fragile habitat and the endangered species that rely on it. They argue the use of herbicides in such a sensitive ecological area carries potential risks for water quality, wildlife and the wider ecosystem.

Concerns have also been raised about the timing of the operation, with critics questioning why the spraying is proceeding despite an Environment Court appeal challenging aspects of the plan.

Environmental group Flora and Fauna of Aotearoa says the situation raises broader questions about transparency, environmental safeguards and public confidence in decision-making around the use of chemicals in protected landscapes.

The Te Henga wetlands form part of a significant ecological area in the Waitākere Ranges, recognised for its biodiversity and the presence of threatened native species. Wetlands such as these are considered critical habitats for native birds, plants and aquatic life.

Glyphosate is one of the most widely used herbicides in Aotearoa and internationally. While it is commonly used to control weeds in agriculture and conservation work, its use in sensitive environments continues to generate debate among scientists, regulators and environmental groups.

Supporters of targeted herbicide programmes argue that invasive species can cause serious damage to native ecosystems if left unmanaged, often crowding out indigenous plants and altering habitats.

Critics, however, say greater caution is required when chemicals are applied in areas containing endangered species or waterways, particularly when alternative methods of weed control may be available.

The case has become another flashpoint in wider debates about environmental protection, chemical use and the balance between conservation management and ecological risk.

With the Environment Court appeal still underway, the spraying programme at Te Henga is likely to remain under close scrutiny from environmental groups, regulators and the local community.