Over 150 protestors were arrested here today as they blocked the roads and rallied in front of the Tamil Nadu Agricultural University, demanding the university to stop genetically modified corn field trials. According to farmers, the introduction of advanced BT corn in the state would affect them in the long run. Explaining the ill effects of the BT corn, S Vellaiyan, President, Federation of Tamil Nadu Traders Association, said, ’The introduction of BT Corn will spoil the natural farming practices of the farming community in Tamil Nadu.’