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biosys ACQUIRES LICENSE FOR PATENTABLE NEMATODE SPECIES

 PALO ALTO, Calif., Nov. 18 /PRNewswire/ -- biosys (NASDAQ: BIOS) announced today that it has acquired licenses to develop two new species of beneficial nematodes as insect control agents.
 A new strain of S. glaseri, discovered by Rutgers University, is now exclusively licensed to biosys for commercial development. The other nematode, a new species to be commonly called S. riobravis, was isolated by the United States Department of Agriculture, who granted biosys a co-exclusive license to develop this nematode for commercial use.
 S. glaseri is highly effective against white grubs, one of the most important pests that attacks turf throughout the United States. biosys, which has been testing S. glaseri for three seasons, expects to add a new product based on this nematode -- to be called VECTOR(R)-WG -- to its existing line of professional turf control products in 1994. Other areas of potential control include ornamentals and fruit crops.
 Dr. Rod Sharp, director of research at Rutgers' New Jersey Agricultural Experimental Station, expressed pleasure at the agreement, which was negotiated for Rutgers by Dr. Thomas M. Noone. The agreement allows biosys to develop and market the technology developed by Dr. Randy Gaugler, a world-renowned authority in Rutgers' department of entomology.
 The new species, S. riobravis, is particularly effective against corn earworm, tobacco budworm, fall armyworm and cotton bollworm. Additionally, S. riobravis potentially fulfills the need for effectiveness where higher soil temperatures and low moisture conditions prevail, in such crops as corn, cotton and soybeans. Further research toward field efficacy, production and shelf-stable formulation is planned for 1994.
 "S. riobravis attacks pest larvae before they reach adulthood offering a non-chemical means of control," said inventor Jimmy R. Raulston, an entomologist and research leader with USDA's Agricultural Research Service in Weslaco, Texas. "This nematode is highly specific, known only to infect crop pests such as corn earworms and armyworms.
 "The earworm costs U.S. growers $1.5 billion a year in insecticides and yields losses in corn, cotton, soybeans and tomatoes," Raulston added. "Fall armyworms cause up to $500 million in damage to corn, sorghum and forage crops."
 biosys' patented and proprietary production and formulation technologies will be employed to continue the development of these nematodes, along with the continued collaboration of the USDA.
 biosys is a leader in the development and commercialization of biological pesticide products for the control of a wide range of insect pests. Using advanced science and technology, the company develops and manufactures environmentally safe and effective biological controls for agricultural and consumer markets. biosys, which holds in vitro manufacturing and formulation patents, has diversified its business into the development of baculovirus bioinsecticides and contract manufacturing services for biological pesticides and other industrial products. biosys shares are traded on the NASDAQ/National Market System under the stock symbol BIOS.
 -0- 11/18/93
 /CONTACT: Dr. Edwin C. Quattlebaum, president and chief operating officer, or Bruce G. Fielding Jr., senior vice president and chief financial officer, of biosys, 415-856-9500/
 (BIOS)


CO: biosys ST: California IN: MTC SU:

RB-TM -- SJ002 -- 5940 11/18/93 10:30 EST
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Date:Nov 18, 1993
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