ENSC 201 Lecture Notes - Lecture 13: Weed Control, Glyphosate, Permethrin
10 Mar 2017
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Document Summary
Natural or chemical products used to control or eliminate pests. Produced by pyrethrum plants, flowers of chrysanthemum. Occupational health concerns: pesticide worker safety (inform, protect, mitigate) 1947: federal insecticide, fungicide, and rodenticide act (fifra) Pest management regulatory agency (pmra) of health canada. Pest control products act (pcpa) and regulations. Assessment of scientific information, toxicity studies, and epidemiology studies. Only those uses where human exposure are well below, from 100 times to 1,000 times lower than the no-effect level, are registered for use in canada. Re-evaluation every 15 years (or when necessary) Maximum residue limits (mrl) regulated under pcpa. Determined in the assessment process prior to registration. Set to protect all groups, including susceptible people. Mode of action: block nerve conduction by inhibiting enzymes that maintain electrical conductivity. Grayish-white powder for roach and ant traps. Hopewell employee exposure and contamination near the facility. Symptoms of workers shaking, vision problems, joint pain. Degrades slowly in the sediment, reduced bioavailability.
