<DOCUMENT>
<TYPE>EX-32
<SEQUENCE>4
<FILENAME>mar31200510qsba2ex321.txt
<TEXT>
EXHIBIT 32.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Quarterly Report of Applied DNA Sciences,  Inc. (the
"Company") on Form 10-QSB for the period ended March 31, 2005, as filed with the
Securities and Exchange  Commission on the date hereof (the "Report"),  I, Peter
Brocklesby,  President of the Company,  certify,  pursuant to 18 U.S.C.  Section
1350,  as adopted  pursuant  to Section 906 of the  Sarbanes-Oxley  Act of 2002,
that:

1.   The Report fully complies with the  requirements  of Section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

2.   The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and results of operations of the Company.



                                                     /s/ PETER BROCKLESBY
                                                     ------------------
                                                     Peter Brocklesby
                                                     President
                                                     August 3, 2005

</TEXT>
</DOCUMENT>
