ETX 10 Lecture 14: Pesticides - Designed Killers
27 Nov 2017
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Pesticides: designed killers: definitions, pesticides - any substance used to prevent, destroy, repel, or mitigate any pest, pest - any harmful, destructive or nuisance organism. Can be any species like viruses, bacteria, rats, mice. Aren"t necessarily just critters outdoors, but critters that are internal/can be in you: pesticides have been used as a part of chemical warfare since the beginning of i. ii. time, types of pesticides. Insecticides a: herbicides, fungicides, bactericides i. ii. Fumigants i. i: nematicides, ex. caffeine is a known insecticide. Most insecticides stimulate nervous system i: widely used insecticide, replaced by ddt. 40% of insecticides today are derived from chrysanthemum: why use pesticides? i. 98% of the us population worked on farms. In 1830, 58 hours of manpower were needed to tend an acre of grain in the us a: today it only takes 2 hours. Pesticides are part of the 2% other things and west nile virus.
