Adilabad District Cooperative Marketing Society (DCMS) chairman A. Narayan Reddy, on Thursday tendered his resignation, citing failure to serve farmers. He has been serving as chairman since 2005. The vice-chairman had moved a no-confidence motion a couple of months back. Addressing the media, Mr. Reddy said he was fed up with the current trend of dirty politics. “I will not be able to do justice to farmers even if I continue in the post,” he observed.