Residual dynamics of sporgon in stored mango and its safety evaluation

Residual dynamics in stored mango treated by 50% WP sporgon were analyzed by GC with ECD^Ni63.The result shows that the sporgon aggradational amounts of the sporgon-treated stored mango are 0.8929～1.0433mg/kg in Guangxi Province and 0.8506～0.9522 mg/kg in Guangdong Province.The periods of half-lives are 8～9 days in Guangxi and 8 days in Guangdong,respectively.More than 92% sporgon is degraded 30 days after the sporgon is applied.The last residues are 0.0003～0.0082mg/kg in Guangxi and 0.0003～0.0089 mg/kg in Guangdong in mango flesh,and 0.0037～0.1171 mg/kg in Guangxi and 0.0030～0.1179 mg/kg in Guangdong in whole mango (flesh and skin)after the mangos are treated with 1000～2000mg/kg sporgon and stored for 10～30 days.It is suggested that the application of 1000～2000mg/kg 50% WP sporgon on the stored mango with at least 10 days interval between two applications is safe to conserve mango with less than 2mg/kg residual in the fruit.