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methamidophos : ウィキペディア英語版
methamidophos

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Methamidophos, trade name "Monitor," is an organophosphate insecticide.〔(http://www.alanwood.net/pesticides/class_insecticides.html )〕
Crops grown with the use of methamidophos include potatoes〔 name="http://pmep.cce.cornell.edu/profiles/insect-mite/fenitrothion-methylpara/methamidophos/insect-prof-methamidophos.html"〕 and some Latin American rice〔(Did Your Shopping List Kill A Songbird? ) Bridget Stutchbury, New York Times March 30, 2008〕 Many nations have used methamidophos on crops, including developed nations such as Spain, United States, Japan, and Australia. Due to its toxicity, the use of pesticides that contain methamidophos is currently being phased out in Brazil. In 2009, all uses in the United States were voluntarily canceled.
==Toxicity==
rates of 21 and 16 mg/kg for male and female rats, respectively. 10–30 mg/kg in rabbits, and dermal LD50 of 50 mg/kg in rats. It is rapidly absorbed through the stomach, lungs, and skin in humans, and eliminated primarily through urine.〔()〕 It is a cholinesterase inhibitor.
Breakdown in soil is 6.1 days in sand, 309 days in water at pH 5.0, 27 days at pH 7.0, and 3 days at pH 9.0. Sunlight accelerates breakdown. It is uptaken through roots and leaves of plants.〔

It is classified as a WHO Toxicity Class "Class 1b, Highly Hazardous", and its parent chemical, acephate, is "class III, Slightly Hazardous".

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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