Forest fuel levels have worsened over the past 30 years because of "misguided green ideology", vested interests, political failure and mismanagement, creating a massive bushfire threat, a former CSIRO bushfire scientist has warned.

Victoria's "failed fire management policy" is an increasing threat to human life, water supplies, property and the forest environment, David Packham said in a submission to the state's Inspector-General for Emergency Management.

And he argued that unless the annual fuel reduction burning target, currently at a minimum of 5 per cent of public land, "is doubled or preferably tripled, a massive bushfire disaster will occur. The forest and alpine environment will decay and be damaged possibly beyond repair and homes and people [will be] incinerated."

He said forest fuel levels had climbed to their most dangerous level in thousands of years.

Mr Packham produced his submission in response to a review of bushfire fuel management announced last month by the state government and to be conducted by the Inspector-General for Emergency Management.