The information in this profile may be out-of-date. It was last revised in 1996. EXTOXNET no longer updates this information, but it may be useful as a reference or resource.

Please visit the National Pesticide Information Center (NPIC) to find updated pesticide fact sheets. If you don't find a fact sheet related to your question, feel free to call 1-800-858-7378. NPIC is open five days a week from 8:00am to 12:00pm Pacific Time.


Extension Toxicology Network

Pesticide Information Profiles

A Pesticide Information Project of Cooperative Extension Offices of Cornell University, Oregon State University, the University of Idaho, and the University of California at Davis and the Institute for Environmental Toxicology, Michigan State University. Major support and funding was provided by the USDA/Extension Service/National Agricultural Pesticide Impact Assessment Program.

EXTOXNET primary files maintained and archived at Oregon State University

Revised June 1996


Trade and Other Names: Trade names for products containing isofenphos include Amaze, Oftanol and Pryfon.

Regulatory Status: Isofenphos is a highly toxic insecticide in EPA toxicity class I. Products containing it must bear the Signal Words DANGER - POISON on their labels. Isofenphos is a Restricted Use Pesticide (RUP), which may be purchased and applied only by certified applicators.

Chemical Class: organophospate

Introduction: Isofenphos is an organophosphate insecticide used to control soil-dwelling insects such as white grubs, cabbage root flies, corn roundworms, and wireworms. The product is used in vegetables including maize and carrots, on soil insects in fruit crops like bananas, and in soils with turfgrass. It is a selective contact and stomach poison in insects. It is applied as a preplant or preemergence soil treatment. It is also used to control termites in and around structures. The insecticide may also be found in formulations with the fungicide thiram. It is available in emulsifiable concentrate, dry seed treatment, granular, and wettable powder formulations.

Formulation: It is available in emulsifiable concentrate, dry seed treatment, granular, and wettable powder formulations.

Toxicological Effects:

Ecological Effects:

Environmental Fate:

Physical Properties:

Exposure Guidelines:

Basic Manufacturer:

Miles, Inc.
8400 Hawthorn Road
P.O. Box 4913
Kansas City, MO 64120


References for the information in this PIP can be found in Reference List Number 5

DISCLAIMER: The information in this profile does not in any way replace or supersede the information on the pesticide product labeling or other regulatory requirements. Please refer to the pesticide product labeling.