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'XTOXNET PIP - DIMETHOATE Page 1 o
<br /> EXTOXNET
<br /> Extension Toxicology Network
<br /> Pesticide Information Profiles
<br /> Pesticide Information Project of Cooperative Extension Offices of Cornell University, Oregon State University, the
<br /> Jniversity of Idaho, and the University of California at Davis and the Institute for Environmental Toxicology, Michigan
<br /> .tate University. Major support and funding was provided by the USDA/Extension Service/National Agricultural
<br /> 'esticide Impact Assessment Program.
<br /> ,XTOXNET primary files maintained and archived at Oregon State University
<br /> revised June 1996
<br /> Dimethoate
<br /> Prade and Other Names: Trade names include Cekuthoate, Chimigor 40, Cygon 400, Daphene, De-Fend, Demo
<br /> dF, Devigon, Dicap, Dimate 267, Dimet, Dimethoat Tech 95%, Dimethopgen, Ferkethion, Fostion MM, Perfekthion,
<br /> :ogodan, Rogodial, Rogor, Roxion, Sevigor, Trimetion.
<br /> tegulatory Status: Dimethoate is moderately toxic compound in EPA toxicity class II. Labels for products
<br /> ontaining dimethoate must bear the Signal Word WARNING. Dimethoate is a General Use Pesticide (GUP).
<br /> :heroical Class: organophosphate
<br /> ntroduction: Dimethoate is an organophosphate insecticide used to kill mites and insects systemically and on conta
<br /> t is used against a wide range of insects, including aphids, thrips, planthoppers, and whiteflies on ornamental plants,
<br /> lfalfa, apples, corn, cotton, grapefruit, grapes, lemons, melons, oranges, pears, pecans, safflower, sorghum, soybeans,
<br /> angerines, tobacco,tomatoes, watermelons, wheat, and other vegetables. It is also used as a residual wall spray in farm
<br /> Buildings for house flies. Dimethoate has been administered to livestock for control of botflies. Dimethoate is available i
<br /> .erosol spray, dust, emulsifiable concentrate, and ULV concentrate formulations. Unless otherwise specified, the data
<br /> ummarized in this profile refer to the technical product.
<br /> =ormulation: Dimethoate is available in aerosol spray, dust, emulsifiable concentrate, and ULV concentrate
<br /> 6rmulations.
<br /> toxicological Effects:
<br /> . Acute toxicity: Dimethoate is moderately toxic by ingestion, inhalation, and dermal absorption. The reported acus
<br /> oral LD50 values for the technical product range from 180 to 330 mg/kg in the rat; although an oral LD50 of as to
<br /> as 28 to 30 mg/kg has been reported, it is regarded by some as less reflective of the toxicity of current products
<br /> [2,13]. Reported oral LD50 values in other species are 160 mg/kg in mice and 400 to 500 mg/kg in rabbits [2,13].
<br /> guinea pigs, the oral toxicity is reported as 550 to 600 mg/kg for the pure and laboratory grade of the compound,
<br /> Lttp://extoxnet.orst.edu/pips/dimethoa.htm 6/25/20
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