David Cameron's attempt to turn the Conservative Party green suffered an embarrassing rebuff yesterday, when Friends of the Earth Scotland judged his fellow Scottish Tories to have failed every environmental test.

The parties' manifestos were subjected to the green lobby group's test, and Tories came out by far the worst. Out of a rating of 10, Annabel Goldie's plans scored no points at all.

The group said they welcomed Mr Cameron's concerns about environmental issues, which have spearheaded his moves to shift perceptions of his party. But it said that its reading of the Scottish Tory manifesto left it "very disappointed".

It could find only one proposal to help reduce carbon emissions - a £12m "eco-bonus scheme" to support household and community initiatives in energy saving and renewable power. "This is positive, but completely inadequate in the face of the problem," said the Friends of the Earth report.

A Scottish Tory spokesman responded to the report: "We have focused on the bread and butter issues in our Scottish manifesto whilst preferring to tackle climate change at UK level, where the radical measures can be made."

He added the green pressure group had not given credit to Tory support for development of carbon capture.

The report card on other parties' manifestos gave Scottish Greens top marks, losing only one point over changes to planning law. Scottish Socialists fared well, and LibDems did better than both Labour and the SNP.

Labour was picked up for its vagueness over nuclear power plans, while the SNP was challenged to explain how it can meet its "ambitious" climate change goals while retaining commitments to build roads and expand air travel.