By John Lyons SILVIA, Colombia, July 23 (Reuter) President Ernesto Samper on Wednesday criticised delays in delivery of promised U.S. counternarcotics aid for what he termed Colombia's ``often lonely and misunderstood'' war on drugs. He delivered the thinly veiled attack on Washington at a ceremony in which 2,000 Guambiano Indians pledged to end the illegal cultivation of opium poppies in the mountains which tower above this Andean village in southwest Cauca province. ``The struggle we are undertaking is sometimes much too lonely and misunderstood,'' Samper said in reference to Washington's decision to ``decertify'' Colombia for a second consecutive year for its failure to crack down hard enough on drug trafficking converting it into a virtual pariah state. Without naming the United States, Samper talked of ``delays in handing over aid'' a guarded reference to a recent U.S. refusal to deliver a $70 million counternarcotics package to the Colombian army without guarantees that the military would improve its dismal human rights record. At the ceremony, Guambiano chief, Henry Tunubala, clad like his fellow villagers in a traditional blue and purple robe, said his community had eradicated 1,300 acres (540 hectares) of opium poppies by hand. Samper said his government would donate a package worth about $1 million, including 7,200 acres (3,000 hectares) of land, to a crop diversification programme in the community to help the Guambianos grow legal cash crops. The community first turned to growing poppies, used in heroin production, about five years ago as their traditional crops of potatoes, yucca and garlic began to dwindle. Drug traffickers paid growers as much as $2,000 every four months for the gum of the plant they dubbed the ``cursed flower,'' but the Guambianos decided to halt their illicit trade when it began to create rifts in village life. ``We hope this historic act will serve as an example for the consumer countries to fight harder against the drug use of their own youth,'' Samper said. Tunubala welcomed Samper's expression of support but added a note of caution: ``We have been asking for (government) aid for years but all we've gotten are empty promises.'' 22:22 072397