Newark, Delaware
August 18, 2003

Strategic Diagnostics Inc., a leading provider of antibody products and analytical test kits for the food safety and water quality markets, today reported that the USDA Grain Inspection Packers and Stockyards Administration (GIPSA) recently certified the performance claims of SDI's TraitChek(TM) lateral flow strip test for the detection of Cry1F Herculex(TM) I. This certification is in addition to SDI's recent announcement with regard to receiving GIPSA certification for TraitChek(TM) Cry3Bb test for corn rootworm.

The TraitChek(TM) Bt1F lateral flow strip test is able to detect, in only 10 minutes, one Cry1F Herculex(TM) I corn kernel in 600 non-Cry1F Herculex(TM) I corn kernels (0.166%). The TraitChek(TM) Bt1F test is the only available lateral flow test for Cry1F in corn that has been certified by GIPSA. Herculex(TM) I is a new insect protection trait from Dow AgroSciences and Pioneer Hi-Bred, International that offers protection against a greater number of prevalent insects than other Bt corn products on the market, providing growers with full-season protection against this broader insect spectrum. Before the introduction of Bt corn events, yield losses and insect control expenditures associated with the European corn borer insect cost farmers in the United States more than $1 billion dollars annually.

"We consider the GIPSA certification critical to our ongoing and extensive stewardship efforts, and we are extremely pleased that SDI has attained it," said Larry Stenberg, channel manager at Dow AgroSciences.

Arthur A. Koch, Jr., President and CEO of SDI commented, "We are delighted to have received this additional certification from GIPSA. We believe SDI's product line for genetically-modified trait detection is unmatched in the marketplace and we are excited about our ongoing relationships with a company of Dow AgroSciences' caliber."

GIPSA facilitates the marketing of livestock, poultry, meat, cereals, oilseeds, and related agricultural products, including the establishment of standard testing methodologies to accurately and consistently measure grain quality. Although GIPSA performance certification is not required by SDI to market its products, it is expected by customers as a independent third-party validation of SDI's product claims.

Dow AgroSciences is a global leader in providing pest management and biotechnology products that improve the quality and quantity of the earth's food supply and contribute to the health and quality of life of the world's growing population.

SDI is a leading provider of biotechnology-based diagnostic tests for a broad range of agricultural, industrial, and water treatment applications. Through its antibody business, Strategic BioSolutions, Strategic Diagnostics also provides antibody and immunoreagent research and development services. SDI's test kits are produced in a variety of formats suitable for field and laboratory use, offering advantages of accuracy, cost-effectiveness, portability, and rapid response. FeedChek(TM), TraitChek(TM), GMO QuickChek(TM), and GMOChek(TM) are pending trademarks for SDI.

Origianl GIPSA Program Announcement

GIPSA VERIFIES PERFORMANCE OF TEST KIT TO DETECT YIELDGARD ROOTWORM® CORN

WASHINGTON, DC (July 31, 2003) – The USDA Grain Inspection, Packers and Stockyards
Administration today announced it verified that the Strategic Diagnostics, Inc. Trait3TM Cry3Bb Corn
Grain Test Kit #7000041 Qualitative Lateral Flow Strip Kit detects the presence of one kernel of
YieldGard Rootworm® corn in 800 kernels in 5 minutes (test strip development time).

This test was evaluated under GIPSA’s Rapid Test Performance Evaluation Program.

GIPSA administrator Donna Reifschneider said that GIPSA’S evaluation of this test will help the U.S. grain market make more informed decisions about the grain being bought and sold.

For information on GIPSA’s Rapid Test Performance Evaluation Program and Proficiency
Program, visit GIPSA’s Biotechnology web page at http://www.usda.gov/gipsa/biotech/biotech.htm.

For technical information on test kit performance evaluation, contact Don Kendall, Biotechnology
Program Manager, GIPSA Technical Services Division, 816-891-0463.

See: http://www.usda.gov/gipsa/newsroom/release/current/4503.htm