Extra stuff for midterm 2

Extra stuff for midterm 2 - T he effect of insecticides 1....

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The effect of insecticides 1. Selection for insects that are genetically resistant to the chemicals 2. Destruction of non-target organisms, including pollinators, the natural enemies of the pests, and soil anthropods 3. Pest resurgence-a dramatic increase in numbers of the targeted pests can occur due to 1 and 2, and if the natural enemies recover much more slowly than the pest population, the latter can exceed levels found prior to insecticide treatment 4. Secondary pest outbreak- a combination of suppression of the original target pest and effects 1 and 2 can lead to insects previously not considered pests being released from control and becoming major pests 5. Adverse environmental effects, resulting in contamination of soils, water systems and the produce itself with chemicals that accumulate biologically (especially in vertebrates) as the result of biomagnifications through food chains 6. Dangers to human health either directly from the handling and consumption of insecticides or indirectly via exposure to environmental sources. Insecticide resistance
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This note was uploaded on 02/13/2010 for the course BIOL BIOL 350 taught by Professor Garydunphy during the Fall '09 term at McGill.

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Extra stuff for midterm 2 - T he effect of insecticides 1....

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