There is a warning of an ecological disaster, if plans to field trial genetically modified pine trees go ahead.
Crown Research Institute Scion has made an application for the trial.
It wants to plant a new strain of pine trees which have been genetically engineered to grow faster.
GE Free New Zealand claims Scion is deliberately ignoring the threat the trial poses to the country's ecosystem.
Spokeswoman Claire Bleakley said the application claims pine pollen can only travel 300 centimetres, but research over a long period of time shows pine pollen can actually spread up to 60 kilometres.
She said it would be a disaster if GE pollen got into the wild.
"GE pines are not sustainable and will create serious damage. It will be our children and future generations who will be left to live with the consequences."
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