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A FOXNETPIP-FENAh1lP11OS :Hace.orst.edu/cgi-bin/mfs/01/pips/I'cnamiph.htm <br /> EXTOXNET <br /> Extension Toxicology Network <br /> Pesticide Information Profiles <br /> A Pesticide Information Project of Cooperative Extension Offices of Cornell University, Oregon State <br /> University, the University of Idaho, and the University of California at Davis and the Institute for <br /> Environmental Toxicology, Michigan State University. Major support and funding was provided by the <br /> USDA/Extension Service/National Agricultural Pesticide Impact Assessment Program. <br /> EXTOXNET primary files maintained and archived at Oregon State University <br /> Revised June 1996 <br /> Fenamiphos <br /> Trade and Other Names: Trade names for products containing fenamiphos include Bay 68138, <br /> Nemacur and Phenamiphos. It may also be found in formulations with other pesticides such as <br /> isofenphos, carbofuran and disulfoton. <br /> Regulatory Status: Fenamiphos is an highly toxic compound in EPA toxicity class I. It is a <br /> Restricted Use Pesticide (RUP). RUPs may be purchased and applied only by a certified applicator. <br /> Labels for products containing fenamiphos must carry the Signal Word DANGER. <br /> Chemical Class: organophosphate <br /> Introduction: Fenamiphos is an organophosphate nematicide used to control a wide variety of <br /> nematode (roundworm) pests. Nematodes can live as parasites on the outside or the inside of a plant. <br /> They may be free living or associated with cyst and root-knot formations in plants. Fenamiphos is used <br /> on a variety of plants including tobacco, turf, bananas, pineapples, citrus and other fruit vines, some <br /> vegetables, and grains. The compound is absorbed by roots and is then translocated throughout the plant. <br /> Fenamiphos, as is typical of other organophosphates, blocks the enzyme acetylcholinesterase in the <br /> target pest. The pesticide also has secondary activity against other invertebrates such as sucking insects <br /> and spider mites. It is available in emulsifiable concentrate, granular, or emulsion formulations. <br /> Formulation: It is available in emulsifiable concentrate, granular, or emulsion formulations. <br /> Toxicological Effects: <br /> • Acute toxicity: Fenamiphos is highly toxic via the oral route, with reported LD50 values of 2 to 19 <br /> mg/kg in the rat and 56 to 100 mg/kg in guinea pigs. It is also highly toxic to dogs and rabbits <br /> I ofd 5/12:'00 2:05 PM <br />