Congress leader Ahmed Patel urged the Centre to follow regulatory process and address concerns of stakeholders while questioning the Centre's urgency despite no immediate demand for GM Mustard.
He said that since GM Mustard constitutes a food crop, the highest standards of safety and precaution must be applied before approval is granted.
"Given that there is lack of consensus on GM crops, the government had imposted a moratorium on its commercial cultivation in 2010.
He observed that the Genetic Engineering Appraisal Committee has rejected RTI requests to make public bio-safety data on the particular variant of GM Mustard.
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"Key tests to ascertain the impact of GM Mustard on health and environment is yet to be done. In this context the inexplicable secrecy combined with regulatory delinquency raises serious questions on the entire process being adopted by the government," he said.
Patel said the government must ascertain the opinion of a cross section of farmers, scientists, activists and other stakeholders before any such move.
Sharing concerns over the increase in import of vegetable oils, the Congress leader said that GM Mustard is not the "pill" for this problem.
"India faced a similar crisis in 1980s which led to the introduction of Oilseeds Technology Mission. Under the programme, mustard cultivation in Gujarat increased from nine quintals per hectare in 1990 to 16.5 quintals per hectare in 2013-14.