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  quarterly  report on Form 10-QSB of Applied DNA
         Sciences, Inc.;

    2.   Based on my  knowledge,  this  quarterly  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 quarterly report;

    3.   Based on my knowledge,  the financial  statements,  and other financial
         information  included in this quarterly  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 quarterly report;

    4.   The  Small  Business  Issuer's  other  certifying  officers  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 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:    August 17, 2006

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