Applied DNA Sciences (APDN) 10-Q 2011 Q2 Quarterly report

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

The undersigned, James A. Hayward, Chief Executive Officer of Applied DNA Sciences, Inc. (the “Company”), in connection with the Company’s Quarterly Report on Form 10-Q for the period ended March 31, 2011 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, hereby certifies pursuant to the requirements of 18 U.S.C. 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), as applicable, of the Securities Exchange Act of 1934, as amended, and

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

This certification is being provided pursuant to 18 U.S.C. 1350 and is not to be deemed a part of the Report, nor is it to be deemed to be “filed” for any purpose whatsoever.

/s/  JAMES A. HAYWARD

James A. Hayward

Chief Executive Officer

May 16, 2011