As a preliminary and essential step in registering a pesticide finished product in China, the applicant should obtain the field trial approval from the MoA. Efficacy and residue studies can be then performed in accordance with full registration requirements. The MoA Order 10 “Data Requirement on Pesticide Registration” was issued in 2008 to specify the requirement for each category of pesticide. The success rate of field trial application decreased from over 90% in 2007 to less than 70% in 2009. ICAMA has summarized the most common problem during field trail application and efficacy study to help applicants better understands data requirements.