Soybean Cyst Nematode Infestations and Damage Reduced with N-Hibit(TM) Seed Treatment from Eden Bioscience.

BOTHELL, Wash. -- Eden Bioscience Corporation (NASDAQ:EDEN) announced that new research shows N-Hibit(TM) Seed Treatment reduces Soybean Cyst Nematode (SCN) eggs and cysts while improving plant growth and development. SCN is a microscopic worm estimated to cost U.S. soybean growers about $1.5 billion in yield losses each year.

Announcement of the N-Hibit results was made during the Commodity Classic earlier this month. Eden Bioscience develops, manufactures and markets innovative, natural protein-based products for improving plant health and vigor. The company also has announced that another of its products, ProAct(TM) Plant Health Regulator, increases soybean yields significantly.

"In initial evaluations of N-Hibit seed treatments, SCN eggs per root weight were reduced," Dr. Ned French, Eden Bioscience Director of Field Biology and Development, told the Commodity Classic audience. "For example, numbers of eggs and cysts were reduced by more than half in research at Southern Illinois University. But the rates of N-Hibit used were not as economically attractive for growers in these initial studies as in the most recent trials with lower rates."

The subsequent replicated research by independent agricultural scientists in Illinois and Georgia investigated lower use rates with N-Hibit CST (Commercial Seed Treatment) and N-Hibit HB (Hopper Box) formulations.

"These cooperators demonstrated that N-Hibit at 0.3 oz/cwt of seed reduced soybean cysts per root weight by an average of approximately 40%," said Dr. French. "N-Hibit treated soybean plants had improved growth and development in their average number of nodes, leaves, root length and volume, and in plant weight (roots, shoots, and leaves) compared with the untreated control.

"These favorable differences in plant growth may be a consequence of lessened nematode presence and damage. On average, root volume and root length increased more than 30%. Plant height, nodes per plant, and leaf count each increased by 14% to 21%. And total dry plant weight rose 22%," said Dr. French. "Such growth effects can have a positive impact on nutrient uptake and distribution, plant health, ability to withstand stress, and ultimately yield.

"The soybean cyst nematode reductions are consistent with what we have seen in cotton for several years, where N-Hibit reduced the juveniles and eggs of root knot nematodes and reniform nematodes by about 50%, while enhancing plant growth," Dr. French noted.

Iowa State University agronomists note that SCN is the single most damaging pest affecting soybean in the U.S. Many farms suffer declining yield for several years without before SCN is discovered, and ISU says losses have been estimated at about $1.5 billion in the U.S. alone. The soil-borne microscopic worm is widely present in many states (75% of Iowa fields) and can reduce soybean yield by 50% or more. The University of Missouri estimated the 2004 U.S. soybean yield losses due to SCN totaled 136.7 million bushels.

University nematologists note that once present in the soil, SCN can never be eliminated, but populations of them can be managed. Traditionally management is through sampling soil to monitor egg and juvenile counts, rotating crops, selecting resistant soybean varieties, taking steps to improve plant health, sanitizing equipment used in infected fields, and if necessary using chemical nematicides that treat the soil but do not provide season-long control, allowing SCN populations to rebound.

"N-Hibit is an important and very economical new tool for growers to use in the management of SCN," said Mike Cloutier, Eden Bioscience Director of Sales and Marketing. "The harpin protein in N-Hibit activates the plant's own self-defense and growth systems to defend itself from within against nematodes in the surrounding soil. This is a unique mode of action, and one that involves virtually no environmental or health issues, and because of its high degree of safety, N-Hibit can be applied on-farm at planting as well as applied by commercial seed treaters.

"We recommend applying N-Hibit to the seed either at the dealer or in the hopper box at 0.3-ounce per 100 pounds of soybean seed. The cost of this treatment is exceptionally low, and we believe the increased plant health and growth that result will provide a benefit that growers will appreciate.

"With this research data coming so close to planting, we look forward to gaining wider experience with N-Hibit on soybeans this year in selected markets as we target the broader market for 2007."

N-Hibit is a dry powder that is not a restricted use product. It is easy to apply by the seed dealer or in the hopper box, has an excellent safety profile, and leaves no residuals in the water, soil or on plants.

The active ingredient in N-Hibit and other Harp-N-Tek(TM) products exclusive to Eden Bioscience is harpin protein, which is produced by disease causing bacteria that attack plants. Harp-N-Tek products do not contain pathogens, but cause the plant to respond as though being attacked, Dr. French explained. Harpin proteins do not enter the plant. They bind with the plant's external harpin protein receptors, which are present on seed as well as foliage. This turns on the plant's natural self defense and growth systems. Then the harpin proteins harmlessly disintegrate.

In 2006, Dr. French plans to initiate field trials to investigate the performance of new, experimental seed treatments Eden Bioscience is developing for soybeans. This testing program will include on-farm evaluations with crop advisers and growers.

Growers may phone the Eden Bioscience customer service desk at 888-552-5976 for more information about ProAct and other Harp-N-Tek(TM) products, or go online to www.edenbio.com.

About Eden Bioscience

Eden Bioscience was founded in 1994. Corporate headquarters are located in Bothell, WA, where the company maintains manufacturing and research facilities. N-Hibit, ProAct and Harp-N-Tek are trademarks, and Eden Bioscience is a registered trademark, of Eden Bioscience Corporation.