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Moreover , many families , especially in Putumayo , use a wide variety of deadly chemicals such as paraquat in the cultivation of illegal crops ( often storing them in their homes ) without taking any safety precautions . Washington 's certification of Peru 's anti-drug policy has triggered a heated debate here , not only entailing criticism by organisations of coca farmers on the procedures used to eradicate the illegal crop , but also a diplomatic row between Peru and neighbouring Colombia . The plan itself began to morph into more of a blow against the illegal crops , while at the same time supposedly retaining the " social side .