A preliminary report on NSW's management of invasive species has proposed a revamp of a system it says is incohesive.

Released this month, the NSW Invasive Species Management Review found "siloed governance structures" meant key players were not working together to tackle invasive species.

The report also found "complex" government structures are creating potential for confusion, overlap and gaps in roles.

"The system’s shared responsibilities for planning and resourcing have been articulated in NSW but have not been supported by strategic, risk-based prioritisation, consistent leadership and coordination of cross-tenure programs or a resourcing strategy to make the most effective and efficient use of limited funds," the report said.

"Siloed management across different agencies without consistent leadership and guidance from Agriculture and Biosecurity within the Department of Primary Industries and Regional Development (DPIRD) means that the operation and understanding of responsibilities varies significantly between organisations."

The report proposed an Invasive Species Investment Program with funding allocated in five-year terms.

Feral animals and invasive weeds also take their toll. PHOTO: Wikimedia

It also proposed remaking the NSW Invasive Species Plan to be "outcomes driven" and include biodiversity and Aboriginal cultural values.

The Natural Resources Commission is heading the review and estimated in a worst-case scenario that failing to effectively manage new incursions from invasive species could annually cost of $29.7 billion by 2030.

Invasive Species Council Advocacy Director Jack Gough said the review plains an "ugly picture" of invasive species management in NSW.

"Without major changes and increased investment in invasive species management our state’s economy, productivity and native wildlife will suffer," Mr Gough said.

"We congratulate the Natural Resources Commission on such a comprehensive report and hope this review will provide the new NSW Government with a platform to drive the reform, funding and focus needed to reduce the damage and prevent the next wave of invasive species-driven extinctions."

NSW Minister for Agriculture Tara Moriarty said the Government has been tackling invasive species while the report was underway.

"We haven’t sat still - we’ve got on with the job and started addressing the feral pig problem, fixing the system’s governance by creating the Independent Biosecurity Commissioner role and appointing Dr Marion Healy, plus providing record funding for biosecurity and NSW local land services.

“In addition, we will be making sure that public land managers are not only compliant but are leading the way in how they manage the public estate for future generations."

However, the Greens and Nationals said the Government needs to do more.

"This should serve as a wake-up call for the Government to implement the common sense recommendations in the report, including funding for a five year Invasive Species Program and investment in regional pest and weed coordinators," Nationals Shadow Minister for Regional NSW said.

"I’m genuinely concerned that the Government wants to process this report in their own time. The reality is that the environment cannot be expected to wait while the Minns Labor Government figures out what parts of this report are politically convenient for them," Greens environment spokesperson Sue Higginson said.