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POWER OF ATTORNEY
The undersigned constitutes and appoints Timothy J. Donnelly, Andrea Knight
and Michael V. Lee, and each of them, as the undersigned's true and lawful attorneys-
in-fact and agents, with full power of substitution and resubstitution, for the
undersigned and in the undersigned's name, place and stead, to sign any and all
Securities and Exchange Commission statements of beneficial ownership of securities
of American Vanguard Corporation, a Delaware corporation (the "Company") on Forms
3, 4 and 5 as required under Section 16(a) of the Securities Exchange Act of 1934, as
amended, and to file the same with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, the Company and
the stock exchange or national market system on which such shares are publicly traded,
granting unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each act and thing requisite and necessary to be done under
said Section 16(a), as fully and to all intents and purposes as the undersigned might or
could do in person, hereby ratifying and confirming all that said attorneys-in-fact and
agents, and each of them, may lawfully do or cause to be done by virtue hereof.
A copy of this power of attorney shall be filed with the Securities and Exchange
Commission. The authorization set forth above shall continue in full force and effect
until the undersigned revokes such authorization by written instructions to the
attorneys-in-fact.
The authority granted hereby shall in no event be deemed to impose or create
any duty on behalf of the attorney-in-fact with respect to the undersigned's
obligations to file Forms 3, 4 and 5 with the Securities and Exchange Commission.
Dated: June 1, 2011
/s/ Debra F. Edwards
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Debra F. Edwards