Ainsworth, MP for Surrey East, has pledged to take their case - and a delegation of organic producers - to David Miliband, secretary of state for the environment. A meeting is likely to take place within two months.
Representatives of 74 organic businesses told Ainsworth this week they feared government moves to allow non-GM foods to contain up to 0.9% GM content would result in an added cost burden on organic producers. The upper limit would form part of 'co-existence' rules, designed to regulate the growing of GM food in the UK alongside non-GM.
Experts warn that if GM crops are grown here, some tainting of non-GM crops with GM is inevitable - and the EU has left member states to draw up national limits on GM content for non-GM foods.
In a consultation last year - the results of which are still awaited - the UK government proposed following a non-binding European Commission opinion allowing a GM content of up to 0.9% in non-GM foods.
This means that if GM content of up to 0.9% is there by accident, for instance through cross-pollination, a product does not have to be labelled GM.
However, organic certification bodies demand in their standards a GM content of no more than 0.1% in all organic products - and they have warned they will stick with that, whatever the government decides.
This means that, if the government does opt for a 0.9% co-existence limit, the responsibility for ensuring crops stay GM-free will lie squarely with organic producers - or they face losing their organic status.
"This tells you where the economic burden will fall," said Soil Association director Peter Melchett, who attended the meeting with Ainsworth.