American Vanguard Enters Exclusive Multi-Year Agreement with Bayer CropScience for Bayleton(R) Fungicide.

NEWPORT BEACH, Calif. -- American Vanguard Corporation (NYSE:AVD) today announced that its subsidiary, AMVAC Chemical Corporation, entered into an exclusive multi-year agreement with Bayer CropScience LP to market, sell and distribute Bayleton(R), a fungicide, in the United States. Terms of the agreement were not disclosed.

Bayleton (active ingredient Triadimefon) controls the diseases, powdery mildew and rusts on a range of fruits and vegetables, including pumpkins, melons, grapes, and cucumbers, as well as apples and pears, the two crops on which it is most often used. Under the terms of the agreement, Bayer CropScience will supply the formulated product to AMVAC. AMVAC will begin marketing the product immediately.

Eric Wintemute, President and CEO of American Vanguard, stated, "Bayleton is an important addition to our portfolio in top fruit. Since we have a strong presence in Bayleton's key crops and regions, we believe AMVAC is well positioned to maximize the potential from this product. I am especially pleased to report that this agreement represents our third agreement with Bayer CropScience to date. We continue to execute on our growth strategy to acquire and license niche product lines from the largest companies in the industry."

About American Vanguard

American Vanguard Corporation is a diversified specialty and agricultural products company that develops and markets products for crop protection and management, turf and ornamental management, and public and animal health. The Company's basic strategy is to acquire brand name, niche product lines from larger companies that divest mature products to focus on newly discovered molecules. During 2005, American Vanguard was recognized as one of BusinessWeek's Hot Growth Companies (#72), FORTUNE Small Business' America's 100 Fastest Growing Small Companies (#40) and Forbes' 200 Best Small Companies (#59). 2005 marks the third consecutive year American Vanguard has been included on these three lists - the only company to hold this honor. American Vanguard is included on the Russell 2000(R) and Russell(R) 3000 Indexes. To learn more about American Vanguard, please reference the Company's web site at www.american-vanguard.com.

American Vanguard, from time to time, may discuss forward-looking information. Except for the historical information contained in this release, all forward-looking statements are estimates by American Vanguard's management and are subject to various risks and uncertainties that may cause results to differ from management's current expectations. Such factors include weather conditions, changes in regulatory policy and other risks as detailed from time-to-time in American Vanguard's SEC reports and filings. All forward-looking statements, if any, in this release represent American Vanguard's judgment as of the date of this release.