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Pyrethrin
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===Bees=== Pyrethrins are applied broadly as nonspecific insecticides. [[Bees]] have been shown to be particularly sensitive to pyrethrin, with fatal doses as small as 0.02 micrograms.<ref name="xerces.org"/> Due to this sensitivity and [[pollinator decline]], pyrethrins are recommended to be applied at night to avoid typical pollinating hours, and in liquid rather than dust form.<ref>Hooven, L., R. Sagili, and E. Johansen. "How to Reduce Bee Poisoning from Pesticides." (n.d.): n. pag. Oregon State University, Dec. 2006. Web. 23 Mar. 2015. <http://www.ipm.ucdavis.edu/PDF/PMG/pnw591.pdf></ref>
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