There is no industrial activity now in the state and the only industry that had flourished was bomb-making units, Singh said.
"Before the 2011 Assembly election, TMC had given the slogan for bringing in change and gave the people assurance that it will stop atrocities unleashed by the communists. But after five years of TMC rule, the situation remains unchanged," he told election meetings in support of BJP candidates.
Noting that infiltration from Bangladesh was continuing unabated and the state government had failed to check it, Singh promised the borders with neighbouring country would be sealed and infiltration checked if BJP was voted to power.
"If voted to power, we will also change the situation in Bengal," Singh said adding the situation had "improved" in states where BJP is in power.
"But in Bengal one can see only sad state-of-affairs prevailing. Under the TMC 'Maa-Mati-Manush' rule everyone is facing threat."
Singh also criticised CPI(M) and Congress for entering into 'opportunistic alliance' in Bengal while facing each other in Kerala on the poll turf.