He said India is in "ideological turmoil" but scientists must speak "fairly, fearlessly and freely weighing in on the side of scientific evidence rather than the dominant "ideology" of the day.
"The scientific evidence is very clear that GM crops are safe. ...The reason for the opposition to GM is not because of the Science primarily, but other fears. Are they warranted or not, is a separate issue," Raghavan told PTI on the sidelines of 44th Lal Bahadur Shastri Memorial Lecture organised by Indian Agricultural Research Institute (IARI).
Unfortunately, the issue of GM safety has clouded the other debate that raises interesting questions which are much more complex to address, he added.
The Secretary also said: "We should address other issues calmly rather than worrying too much on GM and non-GM crops."
Meanwhile, in his lecture, Raghavan emphasised the need for scientists to speak based on "evidence" by citing an example of how ideology of Soviet Union's then Agriculture Minister Trofim Lysenko had influenced the farm policy adversely.
"Biology in today's Russia has still not recovered from Lysenkoism, he added.
Noting that India too is in "ideological turmoil", he said that citizens have their own ideology but scientists should speak based on evidence.
"We must press for correct moral decisions to be taken. ...If public science is to service public good, scientists in countries such as India must speak up for reason and must dominate the landscape of bringing science to be partner in solving our agricultural and health problems," he said.
Last week, Agriculture Minister Sharad Pawar informed Parliament that there are no "credible scientific reports" to prove that GM crops have adverse impact on environment, human health and livestock.
It may be recalled that a technical committee appointed by the Supreme Court had last year recommended an indefinite moratorium on open field trials of GM crops till the deficiencies in the regulatory and safety systems are effectively addressed.
