Sir, During the Tony Blair decade, rising living standards and growing unease about food safety and production methods led many shoppers to buy into the organic and natural products lifestyle. With food prices low and with more money to spend, people were willing to pay a premium for products that provided greater levels of traceability, higher animal welfare standards and more strict controls on the use of pesticides or GM ingredients.

To support this market growth, many in the organic movement were happy to spread fears about the possible health or environmental impact of technologies such as GM without any scientific evidence to support their claims. The organic movement is seeking to close the door on many technologies that will be key to meeting the enormous challenge of feeding a growing population, coping with climate change and safeguarding precious land water and energy reserves.

As we now see sales of organic food fall for the third year in a row in the UK a 25% drop since 2008 ('Focus on organic', 27 August), I think it is now time for our politicians and policymakers to give less weight to the views of the organic sector about farming policy.

The rapid decline in the organic market sends a clear signal that we should now put science-based decisions back at the heart of our food and farming policies.

Dominic Dyer, CEO, Crop Protection Association