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"XTOXNET PIP - ESFENVALERATE Page 1 01, EXTOXNET Extension Toxicology Network Pesticide Information Profiles 4 Pesticide Information Project of Cooperative Extension Offices of Cornell University, Oregon State University, the Jniversity of Idaho, and the University of California at Davis and the Institute for Environmental Toxicology,Michigan hate University. Major support and funding was provided by the USDA/Extension Service/National Agricultural ?esticide Impact Assessment Program. EXTOXNET primary files maintained and archived at Oregon State University Revised June 1996 Esfenvalerate Trade and Other Names: Trade names for the older fenvalerate compounds include Ectrin, Pydrin, Sanmarton, Sumifly, Sumiflower, and Sumitick. Trade names for the new product, esfenvalerate, include Asana XL,Halmark, and Sumi-alfa. The compound may also be listed as S-fenvalerate. Regulatory Status: Most products containing esfenvalerate are General Use Pesticides(GUPs). The emulsified concentrate formulation is a Restricted Use Pesticide (RUP)because of possible adverse effects in aquatic organisms. Esfenvalerate is a moderately toxic pesticide in EPA toxicity class II; products containing it must contain the Signal We WARNING on the label. Chemical Class: pyrethroid Introduction: Esfenvalerate is a synthetic pyrethroid insecticide which is used on a wide range of pests such as mot flies, beetles, and other insects. It is used on vegetable crops, tree fruit, and nut crops. It may be mixed with a wide vari- of other types of pesticides such as carbamate compounds or organophosphates. Esfenvalerate has replaced the natural]: occurring compound fenvalerate (to which it is almost identical) for use in the U.S. Much of the data for fenvalerate is applicable to the pesticide esfenvalerate because the two compounds contain the same components. The only difference in the two products are the relative proportions of the four separate constituents (isomers). Esfenvalerate has become th preferred compound because it requires lower applications rates than fenvalerate, is less chronically toxic, and is a mor( powerful insecticide. The compound contains a much higher percentage of the one insecticidally active isomer(84% fo esfenvalerate and 22% for fenvalerate). Formulation: It may be mixed with a wide variety of other types of pesticides such as carbamate compounds or organophosphates. Esfenvalerate has replaced the naturally occurring fenvalerate( to which it is almost identical) for us in the U.S. Much of the data for fenvalerate is applicable to the pesticide esfenvalerate because the two compounds contain the same components. The only differences in the two products are the relative proportions of the four separate constituents (isomers). Esfenvalerate has become the preferred compound because it requires lower applications rates tl fenvalerate, is less chronically toxic, and is a more powerful insecticide. The compound contains a much higher hnp:Hextoxnet.orst.edu/pips/esfenval.htm 7/2/2'