Number                                               SHARES
          COMMON STOCK                               THIS CERTIFICATE IS
                                                     TRANSFERABLE IN THE CITIES
                                                     OF NEW YORK OR BOSTON
          PAR VALUE
          $1.00 PER SHARE                            CUSIP 723686 10 1


               PIONEER HI-BRED INTERNATIONAL, INC.
                    INCORPORATED UNDER THE LAWS OF THE STATE OF IOWA


          This Certifies that
          S P E C I M E N See Reverse for Certain Definitions is the owner of

          FULL PAID AND NON-ASSESSBLE SHARES OF THE COMMON STOCK OF

Pioneer Hi-Bred           Pioneer Hi-Bred International,Inc.,transferable on
                          the books of the Corporation by the
International, Inc.       holder hereof in person or by Attorney upon surrender 
                          of this Certificate properly endorsed. This Seal
Corporate                 Certificate is not valid until  countersigned by
                          the Transfer Agent and Registered by the Registrar.
Des                       Moines,  Iowa Witness the seal of said Corporation and
                          the signatures of its duly authorized officers.

     Dated:
     /s/Charles S. Johnson                  COUNTERSIGNED AND REGISTERED:
        Chairman, President and CEO              BankBoston, N.A.
    /s/Jerry L. Chicoine                    TRANSFER AGENT AND REGISTRAR,
        Secretary                           BY: /s/Mary Penezic
                                                           AUTHORIZED SIGNATURE









          This  certificate  also  evidences  and entitles the holder  hereof to
certain  rights  as set  forth in a Rights  Agreement  between  Pioneer  Hi-Bred
International,  Inc.  and  the  First  National  Bank  of  Boston  (the  "Rights
Agreement"),  the terms of which are hereby incorporated herein by reference and
a copy of which is on file at the principal executive offices of Pioneer Hi-Bred
International,  Inc.  Under  certain  circumstances,  as set forth in the Rights
Agreement,  such Rights will be evidenced by separate  certificates  and will no
longer be evidenced by this  certificate.  Pioneer Hi-Bred  International,  Inc.
will  mail to the  holder of this  certificate  a copy of the  Rights  Agreement
without  charge after  receipt of a written  request  therefor from such holder.
Under certain circumstances set forth in the Rights Agreement, Rights issued to,
or held by,  any  Person  who is,  was or  becomes  an  Acquiring  Person  or an
Affiliate  or Associate  thereof (as defined in the Amended and Restated  Rights
Agreement) and certain related persons,  whether  currently held by or on behalf
of such Person or by any subsequent holder, may become null and void.

          The following abbreviations,  when used in the inscription on the face
of this certificate,  shall be construed as though they were written out in full
according to applicable laws or regulations:



    TEN COM - as tenants in common     UNIF GIFT MIN ACT            Custodian
                                                          ----------          --------------
                                                                                  
                                                                      (Cust)        (Minor)
    TEN ENT - as tenants by the entireties                          under Uniform Gifts to Minors
                                                                    Act
                                                                        ----------------------
                                                                             (State)


    JT TEN -  as joint tenants with right of
             survivorship and not as tenants
             in common
            Additional abbreviations may also be used though not in the above
            list

For value  received,  __________  hereby sell,  assign and transfer  unto PLEASE
INSERT SOCIAL SECURITY OR OTHER
    IDENTIFYING NUMBER OF ASSIGNEE

- --------------------------------------

PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS INCLUDING POSTAL ZIP CODE OF
ASSIGNEE.

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- ------------------------------------------------------------------------  Shares
of the capital  stock  represented by the  within Certificate and do  hereby 
irrevocably constitute  and appoint__________________________________Attorney to
transfer the said  stock on the books of the  within named Corporation with full
power of substitution in the premises.

Dated ___________________________

                                           ------------------------------