The expedited review process required for eight farm chemicals has raised fears that farmers would no longer have access to important chemistry.
However, Grain Producers Australia research and development spokesperson Andrew Weidemann said while the European market was important, growers were weighing up the importance of the market against the right to use legal products.
"We're getting to the stage now where we're considering whether these markets with really tough MRL requirements are worth it," he said.
"There are a lot of places across the world that would be happy to buy safe and clean Australian grain if the Europeans decide they want to continue down this path of stricter and stricter MRLs.
"Our big worry is that this may be the thin end of the wedge and we may be basically defaulting to European standards even though the production systems are totally different and what is safe in Australia may not be in Europe and vice versa."