University of California, Los Angeles
Department of Biology
Los Angeles, California, 90024

March 31, 1980

Mr. Alan D. Brite
Coppper Brite, Inc.
1482 East Valley Rd.
Santa Barbara, CA 93108


Dear Mr. Brite

This is in reply to your request for my opinion regarding Roach Prufe as a blatticide (cockroach killer.) My assistants and I worked with this blatticide for about fifteen years, while we were employed in University research, and published our results in various scientific journals.

In our field tests in heavily infested housing developments, in private homes, and in hotels, hospitals, rest homes, grocery stores, drugstores, food processing plants, prisons, etc., we found that the powder, when thoroughly applied in the right places, will eliminate even the most severe infestations and act as a preventative against further infestation in those areas in which the powder is left in place and remains dry. A pound of the powder usually suffices for the average infestation in a house or apartment. In every instance the Roach Prufe formula proved strikingly superior in eliminating cockroaches and preventing further infestation.

Roaches are found in dark, secluded areas and in cracks and crevices during the day and at night they move about more widely, but tend to follow certain routes, particularly along intersections. Therefore, the powder should be distributed thoroughly, in as many of the normally infested areas as possible, with a special effort made to scatter it along intersections, as along the back edges of shelves, and in corners, cracks, and crevices. Thorough treatment of the space under and behind refrigerators and ranges and under the sink is especially important. The powder must be so thoroughly applied that roaches cannot crawl about in their normal harborage and breeding places without making contact with the powder. The powder can kill merely by penetrating the roaches' body wall. However, in addition the roach cleans it's legs and antennae by drawing these appendages through it's mouthparts and therefore cannot avoid ingesting some. The powder becomes both a contact and a stomach poison.

The special merit of the Roach Prufe formula is that it is the least repellent to roaches of all the insecticides we have tested. Therefore, they crawl into the powder deposits repeatedly until they are eliminated. Since the powder is inorganic, it is effective as long as it is left in place.

Sincerely Yours,



Walter Ebeling
Professor Emeritus of Entomology





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