The letter, signatories to which include former ministers Anbumani Ramadoss and Vallabhbhai Kathiria, said GM mustard is a "danger" for cultivators, agricultural workers as well as consumers.
On July 17, the Centre had informed the Supreme Court, which had stayed the commercial release of GM mustard crop last year, that so far it has not taken any policy decision in this matter.
"GM mustard is a danger for cultivators, agricultural workers as well as consumers. On the other hand, there are no good reasons that can be seen so far as to why this GM mustard is needed, or what kind of benefits it will offer.
Mustard is one of India's most important winter crops which is sown between mid-October and late November.
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