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ECOGEN AND CHEMLAWN ANNOUNCE POSITIVE RESULTS AGAINST TURF PESTS; NEW PRODUCT AREA FOR ECOGEN

 ECOGEN AND CHEMLAWN ANNOUNCE POSITIVE RESULTS AGAINST TURF PESTS;
 NEW PRODUCT AREA FOR ECOGEN
 LANGHORNE, Pa., Dec. 4 /PRNewswire/ -- Ecogen Inc. (NASDAQ: EECN) and ChemLawn Services Corporation, a wholly owned subsidiary of Ecolab Inc. (NYSE, Pacific Stock Exchange: ECL) announced today that a proprietary Bacillus thuringiensis (Bt) strain isolated by Ecogen has demonstrated significant activity against lawn and ornamental plant insect pests in their greenhouse and laboratory tests.
 The two common pests tested were the Japanese beetle and the northern masked chafer grub. In North America, more than $50 million is spent annually to control these pests on professional turf alone.
 The discovery was the result of a previously announced co- development and license agreement under which ChemLawn would develop and market products containing Ecogen's proprietary Bt strains.
 Ecogen's Bt strains produce a natural protein with no known toxicity to humans, animal or plants. Insects ingest the Bt protein as they feed on lawns and agricultural crops treated with the Bt product. The protein arrests the pests' feeding, and they subsequently die, reducing damage to the lawn or crop.
 "This discovery represents the first time that a Bt strain has been found to have useful activity against turf pests in both artificial diet and laboratory assays, and will open up a whole new product arena for Ecogen in what is a very large market," said John E. Davies, chairman and chief executive officer of Ecogen. "ChemLawn is the world leader in providing lawn and ornamental services. We are extremely pleased with this collaboration and look forward to ChemLawn's commercialization of the product which we will produce and sell to them."
 Dr. David Martin, ChemLawn's director of research, said, "Ecogen offers an exciting technology which can greatly reduce the incidence of these pests without adversely affecting humans, animals or plants. Based upon the encouraging results of our tests, we hope to move swiftly forward in further development of this product. This represents another example of ChemLawn's ongoing commitment to provide an environmentally responsible service as we promote healthy lawns and landscapes for our customers."
 ChemLawn Services Corporation is North America's largest professional lawn and landscape care company, with operations in 45 states and two Canadian provinces. ChemLawn also offers tree and shrub care and indoor pest elimination services.
 Ecogen Inc. is an agricultural biotechnology company specializing in biological pest control. Ecogen has developed and is marketing a number of novel and proprietary biopesticides, including Cutlass(R) vegetable bioinsecticide, Foil(R) potato bioinsecticide, Condor(R) forestry and soybean bioinsecticide and Collego(R) rice bioherbicide. The company is also developing products for cotton, corn and home/garden use.
 A formal presentation of the research results will be made by Ecogen and ChemLawn to the Entomological Society of America at its meeting Dec. 11.
 (Cutlass, Condor, Foil and Collego are registered trademarks of Ecogen Inc.)
 -0- 12/4/91
 /CONTACT: John L. McIntyre, Ph.D., vice president of Ecogen, 215-757-1590, Deb Strohmaier of ChemLawn Services, 614-847-4674, Doug Jones of Strategic Growth International (investors), 212-826-9622, or Anthony J. Russo, or Karin Eskenazi of Noonan/Russo Communications, 212-979-9180, for Ecogen/
 (EECN ECL) CO: Ecogen Inc.; ChemLawn Services Corporation ST: Pennsylvania, Ohio IN: CHM SU: JVN


PS -- NY007 -- 9023 12/04/91 08:31 EST
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Date:Dec 4, 1991
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