Syngenta AG (SYT)

Report of Syngenta Management on Internal Control over Financial Reporting

Syngenta’s Management is responsible for establishing and maintaining adequate internal control over financial reporting. Management has assessed the effectiveness of the Group’s internal control over financial reporting as of December 31, 2005. In making this assessment, it used the criteria established in Internal control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on this assessment Management has concluded that, as of December 31, 2005, Syngenta’s internal control over financial reporting is effective based on those criteria.

Syngenta’s internal control system was designed to provide reasonable assurance to Syngenta’s Management and Board of Directors regarding the reliability of financial reporting and the preparation and fair presentation of its published consolidated financial statements. All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective may not prevent or detect misstatements and can provide only reasonable assurance with respect of financial statement preparation and presentation. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Management’s assessment of the effectiveness of internal control over financial reporting as of December 31, 2005 has been audited by Ernst & Young AG, Switzerland, an independent registered public accounting firm, who also audited our consolidated financial statements included in this annual report. Ernst & Young AG’s attestation report on Management’s assessment of our internal controls over financial reporting is included in this annual report.

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