Arysta LifeScience and Bayer CropScience Continue Successful Cooperation

Tokyo, Japan / Monheim, Germany – April 27, 2005 – Arysta LifeScience and Bayer CropScience today announced a package of agreements that represent a further expansion of their successful cooperation.

As part of the agreement, Arysta LifeScience will acquire amitraz, a broad spectrum acaricide and selective insecticide sold under the tradename Mitac® from Bayer CropScience for global distribution. Arysta LifeScience also will be granted an exclusive license for marketing fluoxastrobin, a Bayer CropScience fungicide, for crop uses in the U.S., Canada and Japan as well as an exclusive license for marketing the compound globally for non-crop uses such as on turf and ornamentals. Bayer CropScience will supply Arysta LifeScience with fluoxastrobin for sale in these markets as well as with tebuconazole for in-can mixtures with fluoxastrobin in the U.S. As per the agreement, Arysta LifeScience also will be granted a co-exclusive license to co-market deltamethrin, a pyrethroid insecticide, in the U.S. crop protection market.

“These agreements are an important step in building the Arysta LifeScience global product portfolio,” said Chris Richards, president and CEO of Arysta LifeScience. “These products will enhance our portfolio in specialty crops – including fruits, vegetables and vines – especially in North America and Japan, and worldwide in the turf and ornamental sector. Amitraz has global applications and we have the marketing organization that can augment the product’s availability to customers. We are an ambitious company with aggressive growth targets and these agreements represent further progress in strengthening our global position in crop protection.”

“We are pleased to expand our successful cooperation with Arysta LifeScience by way of this agreement. This alliance helps us to streamline our product range and enhance the commercial value of our portfolio,” said Dr. Rüdiger Scheitza, Member of the Board of Bayer CropScience.

Financial terms of the transaction were not disclosed.

Bayer CropScience, a subsidiary of Bayer AG with annual sales of about EUR 6 billion, is one of the world’s leading innovative crop science companies in the areas of crop protection, non-agricultural pest control, seeds and plant biotechnology. The company offers an outstanding range of products and extensive service backup for modern, sustainable agriculture and for non-agricultural applications. Bayer CropScience has a global workforce of about 19,000 and is represented in more than 120 countries. Further information is available at:

Headquartered in Tokyo, Japan, Arysta LifeScience is an entrepreneurial provider of crop protection and life science products in 60 countries worldwide. The company’s focus in crop protection is specialty crops, including fruits and vines, and niche and emerging markets. The company is growing by building a world class business in the development, marketing and distribution of respected crop protection brands and an intimate understanding of the needs of global producers. For further information about Arysta LifeScience Corporation, see:

April 27, 2005

Your Contacts:
Steffen Kurzawa, Bayer CropScience AG (Germany)
Tel.: +49 2173 38 – 3504

Donna Uchida, Arysta LifeScience
+1 415-536-3465 / +1 415-602-2495

Forward-Looking Statements
This news release contains forward-looking statements based on current assumptions and forecasts made by Bayer CropScience AG management. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future consolidated results, financial situation, development or performance of the Bayer CropScience AG or our parent company, Bayer AG, and the estimates given here. These factors include those discussed in Bayer AG's public reports filed with the Frankfurt Stock Exchange and with the U.S. Securities and Exchange Commission (including Bayer AG's Form 20-F). Neither Bayer AG nor Bayer CropScience AG assumes any liability whatsoever to update these forward-looking statements or to conform them to future events or developments.