WASHINGTON  The American-led mission in Afghanistan is all but abandoning efforts to destroy the poppy crops that provide the largest source of income to the insurgency, and instead will take significant steps to wean local farmers off the drug trade  including one proposal to pay them to grow nothing.

The strategy will shift from wiping out opium poppy crops, which senior officials acknowledged had served only to turn poor farmers into enemies of the central government in Kabul. New operations are already being mounted to attack not the crops, but the drug runners and the drug lords aligned with the insurgency.

Ultimately, farmers must be persuaded to plant other crops, including wheat for domestic consumption and pomegranates and flowers for export, officials said.

Michael G. Vickers, the Pentagon’s top civilian official for counter-insurgency strategy, said Thursday that the specifics of the new antidrug effort still needed to be worked out, but that a decision had been reached on the new focus.