Exhibit 31.2

           I, Gerhard H. Wehr, certify that:

          1. I have reviewed this quarterly report on Form 10-QSB 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 registrant as of, and for, the periods presented in this
    report;

          4. The registrant's other certifying officer 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)) for the registrant 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 registrant, 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 registrant'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 registrant's internal
    control over financial reporting that occurred during the registrant's most
    recent fiscal quarter (the registrant's fourth fiscal quarter in the case of
    an annual report) that has materially affected, or is reasonably likely to
    materially affect, the registrant's internal control over financial
    reporting; and

          5. The registrant's other certifying officer and I have disclosed,
    based on our most recent evaluation of internal control over financial
    reporting, to the registrant's auditors and the audit committee of the
    registrant'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 registrant'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 registrant's internal
       control over financial reporting.
                                                 /s/Gerhard H. Wehr
                                                 ---------------
                                                 Gerhard H. Wehr
                                                 Chief Financial Officer

Date:  February 18, 2004