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In 1939, the Swiss chemist Paul Mueller mÃ¼ller discovered that this chemical was a potent. PESTICIDE ddt was first used During World WAR, ii as a delousing. Agent later, on areas in Southern, Europe North, africa And asia were fogged WITH, ddt to clear-malaria laden mosquitoes from the paths of Invading allied. troopsDT was first used during World War II, as a delousing agent. Later on, areas in southern Europe, North Africa, and Asia were fogged with DDT, to clear malaria-laden mosquitoes from the paths of invading Allied troops.
1st Generation Pesticides: 1  2500 BC- farmers began using the toxic chemical sulfur to kill off pests from their crops. 2  15th century AD -a variety of chemicals such as, arsenic, hydrogen cyanide, mercury and lead were put to use. 17th century -nicotine sulfate, derived from tobacco leaves was discovered as an effective pesticide and ants were controlled with mixtures of honey and arsenic.