EXHIBIT 23.1 CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS 112 CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statements (Forms S-8 No. 33-55508 and S-3 No. 33-58721) and in the related Prospectuses of our report dated October 17, 1995, with respect to the consolidated financial statements of Mycogen Corporation, included in the Annual Report (Form 10-K) for the year ended August 31, 1995. Ernst & Young LLP San Diego, California October 27, 1995 113