Kill them with mold. The Department of Agriculture has helped them by growing specific fungus for different drug crops. Test spraying has already been done on coca plants in South America, according to reports by growers. The Drug War's Fungal Solution has been developed from strains of fusarium. The fusarium fungus is a huge agricultural problem already, attacking tomatoes, bananas, basil, chocolate, watermelon and other corps.
Farmers have trouble controlling it with even the strongest fungicides.
The ability of the fusarium to mutate is known and the possibilities of the fungus attacking other crops are acknowledged, but fighting evil requires some collateral damage. A story in the Spring issue of Covert Action Quarterly by Jim Hogshire sheds light on the DEA and USDA testing and plans for the fusarium fungus in the war on drugs. These are cash corps, not much different than tobacco, grapes, hops or potatoes for vodka. We would be seriously disturbed if the Bolivians were bombing these crops with toxic fungus. Cuban farmers have reported that some of their organic vegetable farms were sprayed by U.S. planes with a plant-killing fungus.