01:119:160 Lecture Notes - Lecture 5: Microorganism, Rachel Carson, Phytoplankton
1 Nov 2016
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Pesticide - any chemical used to cause the death of the pest organism. Categorized as insecticides, fungicides, herbicides, nematicides, and rodenticides. Insecticides - used to destroy insects, the most widely used pesticide. Examples include lead arsenate, some organic-related chloride compounds, pyrethrum, rotenone. 4 classes of compounds - organochlorines, organophosphates, carbamates, natural pesticides. Organochlorines are also known as the chlorinated hydrocarbons, include ddt, ddd, Natural pesticides - of biological origin, extract from living tissue of naturally occurring plants, nicotine, pyrethrum, rotenone. Fungicides - agents which are toxic to fungi. Fungi have no flowers, leaves, or chlorophyll. Fungi are traditionally one of the 5 kingdoms. Examples of fungi include russ, powdery mildews, penicillium, mushrooms, toadstools. Fungicides act to prevent plant disease, sprayed onto an area and hopefully hit the target organisms and disrupt the normal functioning of the cells in the fungi. Examples of fungicides include cuso4, zncro4, organic mercury compounds.
