EXHIBIT 31.1
                            APPLIED DNA SCIENCES, INC
                  OFFICER'S CERTIFICATE PURSUANT TO SECTION 302

I,   James A. Hayward, certify that:

     1.       I have reviewed this amended quarterly report on Form 10-QSB/A
              of Applied DNA Sciences, Inc.;

     2.       Based  on my  knowledge,  this  report  does  not contain  any
              untrue  statement of  a  material  fact or  omit  to  state  a
              material fact necessary to make the statements made,  in light
              of the circumstances  under which such  statements  were made,
              not  misleading  with respect to  the  period covered  by this
              report;

     3.       Based on my knowledge,  the financial  statements,  and  other
              financial information included in this report, fairly  present
              in all material respects the financial  condition,  results of
              operations and cash flows of the small business  issuer as of,
              and for, the periods  presented in  this report;

     4.       The  small   business  issuer's  other  certifying  officer(s)
              and  I   are  responsible  for  establishing  and  maintaining
              disclosure controls and procedures (as defined in Exchange Act
              Rules  13a-15(e)  and  15d-15(e))  and  internal  control over
              financial   reporting  (as  defined  in   Exchange  Act  Rules
              13a-15(f) and 15d-15(f))  for the small business  issuer and
              have:


                   (a)  Designed  such disclosure  controls and  procedures,
                        or caused such  disclosure   controls and procedures
                        to be designed under our supervision, to ensure that
                        material information relating to the small  business
                        issuer,  including  its  consolidated  subsidiaries,
                        is made known to us by others within those entities,
                        particularly during the period in which this report
                        is being prepared;


                   (b)  [Omitted pursuant to SEC Release No. 33-8238];


                   (c)  Evaluated the  effectiveness  of the small  business
                        issuer's  disclosure  controls  and  procedures  and
                        presented in this report our conclusions  about  the
                        effectiveness   of   the  disclosure   controls  and
                        procedures,  as of  the end of the period covered by
                        this report based on such evaluation; and


                   (d)  Disclosed  in this  report  any  change in the small
                        business issuer's  internal control  over  financial
                        reporting  that occurred  during the  small business
                        issuer's  most recent  fiscal   quarter  (the  small
                        business  issuer's fourth fiscal quarter in the case
                        of an annual report)  that has  materially affected,
                        or is reasonably  likely to materially  affect,  the
                        small  business  issuer's   internal  control   over
                        financial reporting; and

     5.       The small business   issuer's   other   certifying  officer(s)
              and I have disclosed, based on  our  most recent evaluation of
              internal   control  over  financial  reporting, to  the  small
              business   issuer's auditors  and  the audit  committee of the
              small  business   issuer's  board  of  directors  (or  persons
              performing the equivalent functions):


                   (a)  All   significant    deficiencies    and    material
                        weaknesses in the design or  operation  of  internal
                        control   over   financial   reporting   which   are
                        reasonably  likely  to  adversely  affect  the small
                        business   issuer's   ability  to  record,  process,
                        summarize and report financial information; and


                   (b)  Any fraud,  whether or not material,  that  involves
                        management or other employees who have a significant
                        role in the small business issuer's internal control
                        over financial reporting.

Date: October 10, 2006

/s/ JAMES A. HAYWARD
James A. Hayward
Chief Executive Officer